./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be --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 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:52:37,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:52:37,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:52:37,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:52:37,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:52:37,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:52:37,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:52:37,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:52:37,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:52:37,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:52:37,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:52:37,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:52:37,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:52:37,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:52:37,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:52:37,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:52:37,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:52:37,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:52:37,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:52:37,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:52:37,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:52:37,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:52:37,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:52:37,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:52:37,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:52:37,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:52:37,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:52:37,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:52:37,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:52:37,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:52:37,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:52:37,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:52:37,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:52:37,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:52:37,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:52:37,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:52:37,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:52:37,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:52:37,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:52:37,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:52:37,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:52:37,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:52:37,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:52:37,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:52:37,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:52:37,851 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:52:37,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:52:37,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:52:37,853 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:52:37,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:52:37,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:52:37,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:52:37,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:52:37,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:52:37,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:52:37,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:52:37,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:52:37,856 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:52:37,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:52:37,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:52:37,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:52:37,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:52:37,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:52:37,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:52:37,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:52:37,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:52:37,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:52:37,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:52:37,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:52:37,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:52:37,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:52:37,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:52:37,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:52:37,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:52:37,860 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_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 [2021-10-21 19:52:38,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:52:38,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:52:38,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:52:38,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:52:38,229 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:52:38,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-10-21 19:52:38,291 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/data/1b1c4a463/1427ee2ada5d439a86b3936135d8c467/FLAGcfc8e9ca2 [2021-10-21 19:52:38,767 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:52:38,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-10-21 19:52:38,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/data/1b1c4a463/1427ee2ada5d439a86b3936135d8c467/FLAGcfc8e9ca2 [2021-10-21 19:52:39,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/data/1b1c4a463/1427ee2ada5d439a86b3936135d8c467 [2021-10-21 19:52:39,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:52:39,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:52:39,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:52:39,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:52:39,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:52:39,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a00483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39, skipping insertion in model container [2021-10-21 19:52:39,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:52:39,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:52:39,320 WARN L228 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_44deeb31-0627-4601-bd1f-0c486616b8e6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2021-10-21 19:52:39,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:52:39,351 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:52:39,364 WARN L228 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_44deeb31-0627-4601-bd1f-0c486616b8e6/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2021-10-21 19:52:39,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:52:39,388 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:52:39,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39 WrapperNode [2021-10-21 19:52:39,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:52:39,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:52:39,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:52:39,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:52:39,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:52:39,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:52:39,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:52:39,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:52:39,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:52:39,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:52:39,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:52:39,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:52:39,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (1/1) ... [2021-10-21 19:52:39,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:52:39,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:39,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:52:39,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:52:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:52:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:52:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:52:39,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:52:39,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:52:39,818 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-21 19:52:39,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:52:39 BoogieIcfgContainer [2021-10-21 19:52:39,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:52:39,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:52:39,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:52:39,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:52:39,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:52:39" (1/3) ... [2021-10-21 19:52:39,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48605391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:52:39, skipping insertion in model container [2021-10-21 19:52:39,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:52:39" (2/3) ... [2021-10-21 19:52:39,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48605391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:52:39, skipping insertion in model container [2021-10-21 19:52:39,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:52:39" (3/3) ... [2021-10-21 19:52:39,829 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.c [2021-10-21 19:52:39,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:52:39,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-21 19:52:39,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:52:39,887 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 [2021-10-21 19:52:39,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-21 19:52:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 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) [2021-10-21 19:52:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:52:39,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:39,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:39,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1233832305, now seen corresponding path program 1 times [2021-10-21 19:52:39,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:39,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282933268] [2021-10-21 19:52:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:39,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:40,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:40,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196333765] [2021-10-21 19:52:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:40,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:40,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:40,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:52:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:52:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:40,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282933268] [2021-10-21 19:52:40,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:40,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196333765] [2021-10-21 19:52:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196333765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:40,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:40,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:52:40,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632792924] [2021-10-21 19:52:40,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:52:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:52:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:52:40,253 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-21 19:52:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:40,276 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-10-21 19:52:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:52:40,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-10-21 19:52:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:40,286 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:52:40,286 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:52:40,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:52:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:52:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:52:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.375) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-21 19:52:40,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2021-10-21 19:52:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:40,326 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-21 19:52:40,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-10-21 19:52:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-21 19:52:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:52:40,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:40,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:40,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:40,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-21 19:52:40,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-21 19:52:40,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:40,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224291608] [2021-10-21 19:52:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:40,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:40,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:40,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653347329] [2021-10-21 19:52:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:40,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:40,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:40,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:52:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:40,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:40,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224291608] [2021-10-21 19:52:40,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:40,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653347329] [2021-10-21 19:52:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653347329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:40,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:40,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:52:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839159604] [2021-10-21 19:52:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:52:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:52:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:41,000 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-21 19:52:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:47,785 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-10-21 19:52:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:52:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-21 19:52:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:47,788 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:52:47,788 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:52:47,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:52:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:52:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2021-10-21 19:52:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-10-21 19:52:47,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 10 [2021-10-21 19:52:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:47,802 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-10-21 19:52:47,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-21 19:52:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-10-21 19:52:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:52:47,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:47,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:47,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:48,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:48,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1507375428, now seen corresponding path program 1 times [2021-10-21 19:52:48,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:48,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438046345] [2021-10-21 19:52:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:48,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:48,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:48,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486315407] [2021-10-21 19:52:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:48,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:48,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:48,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:52:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:52:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:48,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:48,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438046345] [2021-10-21 19:52:48,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:48,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486315407] [2021-10-21 19:52:48,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486315407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:48,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:48,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:52:48,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362752810] [2021-10-21 19:52:48,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:52:48,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:52:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:48,177 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:48,206 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-10-21 19:52:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:52:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-21 19:52:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:48,209 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:52:48,212 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 19:52:48,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 19:52:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-21 19:52:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.394736842105263) internal successors, (53), 41 states have internal predecessors, (53), 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) [2021-10-21 19:52:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-10-21 19:52:48,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 11 [2021-10-21 19:52:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:48,236 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-10-21 19:52:48,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-10-21 19:52:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:52:48,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:48,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:48,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:48,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:48,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1189409771, now seen corresponding path program 1 times [2021-10-21 19:52:48,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:48,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805493078] [2021-10-21 19:52:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:48,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:48,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:48,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071902551] [2021-10-21 19:52:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:48,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:48,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:48,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:52:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:52:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:48,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805493078] [2021-10-21 19:52:48,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071902551] [2021-10-21 19:52:48,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071902551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:48,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:48,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:52:48,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833970343] [2021-10-21 19:52:48,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:52:48,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:52:48,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:48,689 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-10-21 19:52:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:48,924 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-10-21 19:52:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:52:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-10-21 19:52:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:48,925 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:52:48,926 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 19:52:48,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 19:52:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-10-21 19:52:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-21 19:52:48,933 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2021-10-21 19:52:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:48,933 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-21 19:52:48,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-10-21 19:52:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-21 19:52:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:52:48,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:48,934 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:48,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:49,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:49,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash -112841942, now seen corresponding path program 1 times [2021-10-21 19:52:49,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:49,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318405614] [2021-10-21 19:52:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:49,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:49,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:49,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312199589] [2021-10-21 19:52:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:49,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:49,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:49,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:52:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:52:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:49,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:49,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318405614] [2021-10-21 19:52:49,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:49,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312199589] [2021-10-21 19:52:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312199589] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:49,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:49,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:52:49,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057528535] [2021-10-21 19:52:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:52:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:52:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:52:49,323 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.8) 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) [2021-10-21 19:52:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:49,344 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-21 19:52:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:52:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) 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 [2021-10-21 19:52:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:49,345 INFO L225 Difference]: With dead ends: 44 [2021-10-21 19:52:49,345 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:52:49,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:52:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:52:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:52:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-21 19:52:49,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-10-21 19:52:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:49,353 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-21 19:52:49,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) 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) [2021-10-21 19:52:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-21 19:52:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:52:49,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:49,354 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:49,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:49,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:49,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1045325853, now seen corresponding path program 1 times [2021-10-21 19:52:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:49,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986612] [2021-10-21 19:52:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:49,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:49,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:49,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694628276] [2021-10-21 19:52:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:49,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:49,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:49,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:52:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:49,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:52:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:49,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986612] [2021-10-21 19:52:49,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694628276] [2021-10-21 19:52:49,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694628276] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:49,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:49,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:52:49,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777746182] [2021-10-21 19:52:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:52:49,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:52:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:49,787 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-10-21 19:52:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:49,819 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-10-21 19:52:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:52:49,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 [2021-10-21 19:52:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:49,824 INFO L225 Difference]: With dead ends: 49 [2021-10-21 19:52:49,824 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:52:49,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:52:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-21 19:52:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2021-10-21 19:52:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-21 19:52:49,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2021-10-21 19:52:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-21 19:52:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-10-21 19:52:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-21 19:52:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:52:49,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:49,839 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:49,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:50,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -944107012, now seen corresponding path program 1 times [2021-10-21 19:52:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:50,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766284319] [2021-10-21 19:52:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:50,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:50,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:50,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446365714] [2021-10-21 19:52:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:50,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:50,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:50,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:50,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:52:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:50,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:52:50,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:50,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:50,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766284319] [2021-10-21 19:52:50,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:50,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446365714] [2021-10-21 19:52:50,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446365714] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:50,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:50,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:52:50,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649510276] [2021-10-21 19:52:50,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:52:50,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:52:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:50,247 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-10-21 19:52:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:50,310 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-10-21 19:52:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:52:50,311 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 [2021-10-21 19:52:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:50,312 INFO L225 Difference]: With dead ends: 80 [2021-10-21 19:52:50,312 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:52:50,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:52:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-21 19:52:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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) [2021-10-21 19:52:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-10-21 19:52:50,335 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 23 [2021-10-21 19:52:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:50,335 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-10-21 19:52:50,335 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) [2021-10-21 19:52:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-10-21 19:52:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:52:50,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:50,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:50,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:50,564 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2135520830, now seen corresponding path program 1 times [2021-10-21 19:52:50,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:50,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98196639] [2021-10-21 19:52:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:50,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:50,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:50,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998854597] [2021-10-21 19:52:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:50,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:50,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:50,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:52:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:52:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:50,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:50,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98196639] [2021-10-21 19:52:50,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:50,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998854597] [2021-10-21 19:52:50,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998854597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:50,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:50,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:52:50,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519494974] [2021-10-21 19:52:50,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:52:50,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:52:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:50,760 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-10-21 19:52:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:50,809 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-10-21 19:52:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:52:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 [2021-10-21 19:52:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:50,810 INFO L225 Difference]: With dead ends: 82 [2021-10-21 19:52:50,810 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:52:50,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:52:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:52:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:52:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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) [2021-10-21 19:52:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-10-21 19:52:50,821 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 23 [2021-10-21 19:52:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:50,822 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-10-21 19:52:50,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-10-21 19:52:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-10-21 19:52:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:52:50,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:50,823 INFO L512 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] [2021-10-21 19:52:50,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:51,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:51,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1539131849, now seen corresponding path program 1 times [2021-10-21 19:52:51,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:51,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419933465] [2021-10-21 19:52:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:51,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:51,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:51,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78307517] [2021-10-21 19:52:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:51,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:51,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:51,055 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:51,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:52:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:52:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419933465] [2021-10-21 19:52:51,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78307517] [2021-10-21 19:52:51,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78307517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:51,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:51,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:52:51,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969411076] [2021-10-21 19:52:51,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:52:51,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:52:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:52:51,286 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-21 19:52:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:51,334 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-10-21 19:52:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:52:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2021-10-21 19:52:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:51,335 INFO L225 Difference]: With dead ends: 89 [2021-10-21 19:52:51,336 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:52:51,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:52:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-10-21 19:52:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 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) [2021-10-21 19:52:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-10-21 19:52:51,351 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 25 [2021-10-21 19:52:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:51,351 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-10-21 19:52:51,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 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) [2021-10-21 19:52:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-10-21 19:52:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:52:51,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:51,353 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:51,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:51,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:51,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1249700688, now seen corresponding path program 1 times [2021-10-21 19:52:51,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:51,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843702010] [2021-10-21 19:52:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:51,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:51,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:51,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562729290] [2021-10-21 19:52:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:51,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:51,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:51,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:52:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:52:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:51,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:51,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843702010] [2021-10-21 19:52:51,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:51,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562729290] [2021-10-21 19:52:51,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562729290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:51,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:51,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:52:51,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445126805] [2021-10-21 19:52:51,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:51,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:51,829 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-10-21 19:52:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:51,882 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-10-21 19:52:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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 [2021-10-21 19:52:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:51,884 INFO L225 Difference]: With dead ends: 70 [2021-10-21 19:52:51,884 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:52:51,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:52:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-21 19:52:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 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) [2021-10-21 19:52:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-10-21 19:52:51,911 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 27 [2021-10-21 19:52:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:51,913 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-10-21 19:52:51,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-10-21 19:52:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-10-21 19:52:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:52:51,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:51,920 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:51,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:52,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:52:52,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1841895250, now seen corresponding path program 2 times [2021-10-21 19:52:52,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:52,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49093761] [2021-10-21 19:52:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:52,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:52,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:52,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222870119] [2021-10-21 19:52:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:52,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:52,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:52:52,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:52:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:52,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:52,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49093761] [2021-10-21 19:52:52,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:52,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222870119] [2021-10-21 19:52:52,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222870119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:52,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:52,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:52:52,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491668980] [2021-10-21 19:52:52,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:52:52,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:52:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:52:52,499 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-10-21 19:52:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:52,545 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-10-21 19:52:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 [2021-10-21 19:52:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:52,546 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:52:52,546 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:52:52,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:52:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 19:52:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 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) [2021-10-21 19:52:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-10-21 19:52:52,558 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2021-10-21 19:52:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:52,558 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-10-21 19:52:52,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-10-21 19:52:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-10-21 19:52:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:52:52,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:52,560 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:52,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:52,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:52,764 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2118874485, now seen corresponding path program 2 times [2021-10-21 19:52:52,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:52,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743738185] [2021-10-21 19:52:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:52,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:52,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:52,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564606174] [2021-10-21 19:52:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:52,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:52,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:52,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:52:52,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:52:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:53,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:53,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743738185] [2021-10-21 19:52:53,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:53,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564606174] [2021-10-21 19:52:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564606174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:53,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:53,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:52:53,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726425295] [2021-10-21 19:52:53,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:53,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:53,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:53,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:53,035 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:53,083 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2021-10-21 19:52:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:52:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:52:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:53,084 INFO L225 Difference]: With dead ends: 99 [2021-10-21 19:52:53,084 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:52:53,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:52:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-10-21 19:52:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 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) [2021-10-21 19:52:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-10-21 19:52:53,095 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 29 [2021-10-21 19:52:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:53,095 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-10-21 19:52:53,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-10-21 19:52:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:52:53,096 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:53,096 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:53,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:53,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:52:53,310 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1832191324, now seen corresponding path program 2 times [2021-10-21 19:52:53,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:53,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363192109] [2021-10-21 19:52:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:53,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:53,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:53,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437205548] [2021-10-21 19:52:53,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:53,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:53,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:53,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:52:53,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:53,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:53,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363192109] [2021-10-21 19:52:53,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:53,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437205548] [2021-10-21 19:52:53,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437205548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:53,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:53,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436877075] [2021-10-21 19:52:53,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:53,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:53,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:53,603 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:53,663 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2021-10-21 19:52:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:52:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 19:52:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:53,665 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:52:53,665 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:52:53,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:52:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:52:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-10-21 19:52:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 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) [2021-10-21 19:52:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-10-21 19:52:53,697 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 31 [2021-10-21 19:52:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:53,698 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-10-21 19:52:53,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-10-21 19:52:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:52:53,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:53,699 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:53,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:53,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:52:53,920 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:53,920 INFO L82 PathProgramCache]: Analyzing trace with hash -492171674, now seen corresponding path program 3 times [2021-10-21 19:52:53,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:53,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241668168] [2021-10-21 19:52:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:53,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:53,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:53,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867426026] [2021-10-21 19:52:53,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:53,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:53,933 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:53,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:52:54,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:52:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:52:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:54,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:54,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241668168] [2021-10-21 19:52:54,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:54,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867426026] [2021-10-21 19:52:54,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867426026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:54,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:54,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:52:54,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082115932] [2021-10-21 19:52:54,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:54,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:54,413 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:54,481 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-10-21 19:52:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:52:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 31 [2021-10-21 19:52:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:54,482 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:52:54,483 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 19:52:54,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:52:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 19:52:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-10-21 19:52:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 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) [2021-10-21 19:52:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-10-21 19:52:54,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 31 [2021-10-21 19:52:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:54,494 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-10-21 19:52:54,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2021-10-21 19:52:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-10-21 19:52:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:52:54,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:54,496 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:54,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:54,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:54,701 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -289663777, now seen corresponding path program 3 times [2021-10-21 19:52:54,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:54,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600766655] [2021-10-21 19:52:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:54,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:54,709 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:54,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55399919] [2021-10-21 19:52:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:54,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:54,711 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:54,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:52:54,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:52:54,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:55,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:55,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600766655] [2021-10-21 19:52:55,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:55,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55399919] [2021-10-21 19:52:55,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55399919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:55,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:55,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:55,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600313347] [2021-10-21 19:52:55,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:55,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:55,118 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:55,192 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2021-10-21 19:52:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:52:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-21 19:52:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:55,194 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:52:55,194 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:52:55,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:52:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:52:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-10-21 19:52:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 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) [2021-10-21 19:52:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2021-10-21 19:52:55,207 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 33 [2021-10-21 19:52:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:55,209 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2021-10-21 19:52:55,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2021-10-21 19:52:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:52:55,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:55,210 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:55,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:55,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:55,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash 122158014, now seen corresponding path program 1 times [2021-10-21 19:52:55,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:55,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412642403] [2021-10-21 19:52:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:55,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:55,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:55,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899758213] [2021-10-21 19:52:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:55,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:55,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:55,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:55,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:52:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:55,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:55,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412642403] [2021-10-21 19:52:55,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:55,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899758213] [2021-10-21 19:52:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899758213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:55,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:55,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:55,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570634082] [2021-10-21 19:52:55,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:55,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:55,770 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-10-21 19:52:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:55,851 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-10-21 19:52:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:52:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 35 [2021-10-21 19:52:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:55,853 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:52:55,853 INFO L226 Difference]: Without dead ends: 82 [2021-10-21 19:52:55,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:52:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-21 19:52:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-21 19:52:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 81 states have internal predecessors, (97), 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) [2021-10-21 19:52:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2021-10-21 19:52:55,864 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2021-10-21 19:52:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:55,865 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2021-10-21 19:52:55,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-10-21 19:52:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2021-10-21 19:52:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:52:55,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:55,866 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:55,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:56,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:52:56,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash -602325000, now seen corresponding path program 3 times [2021-10-21 19:52:56,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:56,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36858421] [2021-10-21 19:52:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:56,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:56,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:56,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657731706] [2021-10-21 19:52:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:56,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:56,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:56,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:52:56,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:52:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:52:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:56,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:56,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36858421] [2021-10-21 19:52:56,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:56,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657731706] [2021-10-21 19:52:56,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657731706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:56,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:56,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:52:56,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870847964] [2021-10-21 19:52:56,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:56,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:56,481 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-10-21 19:52:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:56,559 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-10-21 19:52:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:52:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 35 [2021-10-21 19:52:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:56,560 INFO L225 Difference]: With dead ends: 100 [2021-10-21 19:52:56,560 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:52:56,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:52:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:52:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-10-21 19:52:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-10-21 19:52:56,572 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 35 [2021-10-21 19:52:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:56,573 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-10-21 19:52:56,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-10-21 19:52:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-10-21 19:52:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:52:56,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:56,574 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:56,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:56,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:52:56,796 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1451332471, now seen corresponding path program 1 times [2021-10-21 19:52:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:56,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194785504] [2021-10-21 19:52:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:56,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:56,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:56,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923880616] [2021-10-21 19:52:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:56,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:56,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:56,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:52:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:52:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:52:57,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:57,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194785504] [2021-10-21 19:52:57,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:57,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923880616] [2021-10-21 19:52:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923880616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:57,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:52:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336914607] [2021-10-21 19:52:57,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:52:57,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:52:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:57,081 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-10-21 19:52:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:57,143 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-10-21 19:52:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:52:57,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 37 [2021-10-21 19:52:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:57,145 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:52:57,145 INFO L226 Difference]: Without dead ends: 108 [2021-10-21 19:52:57,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:52:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-21 19:52:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2021-10-21 19:52:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 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) [2021-10-21 19:52:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-10-21 19:52:57,160 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 37 [2021-10-21 19:52:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:57,160 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-10-21 19:52:57,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-10-21 19:52:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-10-21 19:52:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:52:57,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:57,161 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:57,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:57,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:52:57,374 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 495867187, now seen corresponding path program 4 times [2021-10-21 19:52:57,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:57,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664599738] [2021-10-21 19:52:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:57,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:57,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:57,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323897506] [2021-10-21 19:52:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:52:57,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:57,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:57,385 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:57,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:52:57,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:52:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:57,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:52:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:57,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:57,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664599738] [2021-10-21 19:52:57,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:57,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323897506] [2021-10-21 19:52:57,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323897506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:57,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:57,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:52:57,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491882933] [2021-10-21 19:52:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:57,807 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 10 states, 10 states have (on average 3.7) 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) [2021-10-21 19:52:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:57,896 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-10-21 19:52:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:52:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) 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 37 [2021-10-21 19:52:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:57,898 INFO L225 Difference]: With dead ends: 152 [2021-10-21 19:52:57,898 INFO L226 Difference]: Without dead ends: 108 [2021-10-21 19:52:57,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:52:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-21 19:52:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-10-21 19:52:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 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) [2021-10-21 19:52:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2021-10-21 19:52:57,914 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 37 [2021-10-21 19:52:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:57,914 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2021-10-21 19:52:57,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) 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) [2021-10-21 19:52:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2021-10-21 19:52:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:52:57,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:57,918 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:57,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:58,132 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 537451730, now seen corresponding path program 1 times [2021-10-21 19:52:58,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:58,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827746311] [2021-10-21 19:52:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:58,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:58,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:58,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472697445] [2021-10-21 19:52:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:58,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:58,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:58,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:52:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:52:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:58,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:58,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827746311] [2021-10-21 19:52:58,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:58,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472697445] [2021-10-21 19:52:58,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472697445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:58,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:58,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:52:58,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687719837] [2021-10-21 19:52:58,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:58,515 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-10-21 19:52:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:58,631 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2021-10-21 19:52:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:52:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 39 [2021-10-21 19:52:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:58,632 INFO L225 Difference]: With dead ends: 154 [2021-10-21 19:52:58,632 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:52:58,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:52:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:52:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-21 19:52:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 109 states have internal predecessors, (130), 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) [2021-10-21 19:52:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2021-10-21 19:52:58,648 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 39 [2021-10-21 19:52:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2021-10-21 19:52:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-10-21 19:52:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2021-10-21 19:52:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:52:58,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:58,649 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:58,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:58,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:58,864 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1621312692, now seen corresponding path program 4 times [2021-10-21 19:52:58,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:58,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380247300] [2021-10-21 19:52:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:58,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:58,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:58,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996784650] [2021-10-21 19:52:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:52:58,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:58,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:58,874 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:52:59,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:52:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:59,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:52:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:59,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:59,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380247300] [2021-10-21 19:52:59,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:59,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996784650] [2021-10-21 19:52:59,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996784650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:59,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:59,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:52:59,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854118277] [2021-10-21 19:52:59,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:52:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:52:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:52:59,236 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-10-21 19:52:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:59,320 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2021-10-21 19:52:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:52:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 39 [2021-10-21 19:52:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:59,322 INFO L225 Difference]: With dead ends: 127 [2021-10-21 19:52:59,322 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:52:59,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:52:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:52:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-10-21 19:52:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 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) [2021-10-21 19:52:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-10-21 19:52:59,338 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 39 [2021-10-21 19:52:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:59,338 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-10-21 19:52:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-10-21 19:52:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-10-21 19:52:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 19:52:59,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:59,339 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:59,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:59,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:52:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1116635019, now seen corresponding path program 1 times [2021-10-21 19:52:59,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:59,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619371145] [2021-10-21 19:52:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:59,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:59,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:59,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131266867] [2021-10-21 19:52:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:59,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:59,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:59,575 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:59,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:52:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:52:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:59,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:59,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619371145] [2021-10-21 19:52:59,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:59,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131266867] [2021-10-21 19:52:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131266867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:59,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:59,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:52:59,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639264421] [2021-10-21 19:52:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:52:59,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:52:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:52:59,952 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:00,050 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-10-21 19:53:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:53:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-21 19:53:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:00,052 INFO L225 Difference]: With dead ends: 168 [2021-10-21 19:53:00,053 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:53:00,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:53:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:53:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2021-10-21 19:53:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2) internal successors, (138), 115 states have internal predecessors, (138), 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) [2021-10-21 19:53:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-10-21 19:53:00,072 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 41 [2021-10-21 19:53:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:00,072 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-10-21 19:53:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-10-21 19:53:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:53:00,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:00,074 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:00,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:00,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:53:00,288 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2063880284, now seen corresponding path program 1 times [2021-10-21 19:53:00,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:00,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973865757] [2021-10-21 19:53:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:00,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:00,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:00,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248306777] [2021-10-21 19:53:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:00,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:00,297 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:00,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:53:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:53:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:00,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:00,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973865757] [2021-10-21 19:53:00,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:00,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248306777] [2021-10-21 19:53:00,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248306777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:00,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:00,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:53:00,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952268965] [2021-10-21 19:53:00,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:53:00,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:53:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:53:00,739 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2021-10-21 19:53:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:00,858 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2021-10-21 19:53:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:53:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 43 [2021-10-21 19:53:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:00,860 INFO L225 Difference]: With dead ends: 144 [2021-10-21 19:53:00,860 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:53:00,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:53:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:53:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2021-10-21 19:53:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 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) [2021-10-21 19:53:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-10-21 19:53:00,895 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 43 [2021-10-21 19:53:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:00,896 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-10-21 19:53:00,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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) [2021-10-21 19:53:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-10-21 19:53:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:53:00,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:00,897 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:00,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:01,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:01,116 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1015747558, now seen corresponding path program 2 times [2021-10-21 19:53:01,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:01,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124142506] [2021-10-21 19:53:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:01,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:01,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:01,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991439375] [2021-10-21 19:53:01,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:01,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:01,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:01,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:53:01,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:01,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:53:01,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:01,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:01,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124142506] [2021-10-21 19:53:01,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:01,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991439375] [2021-10-21 19:53:01,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991439375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:01,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:01,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:53:01,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726224453] [2021-10-21 19:53:01,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:53:01,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:53:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:53:01,564 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-10-21 19:53:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:01,680 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-10-21 19:53:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:53:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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 43 [2021-10-21 19:53:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:01,682 INFO L225 Difference]: With dead ends: 173 [2021-10-21 19:53:01,682 INFO L226 Difference]: Without dead ends: 129 [2021-10-21 19:53:01,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:53:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-21 19:53:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-10-21 19:53:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.188976377952756) internal successors, (151), 127 states have internal predecessors, (151), 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) [2021-10-21 19:53:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2021-10-21 19:53:01,699 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 43 [2021-10-21 19:53:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:01,700 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2021-10-21 19:53:01,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-10-21 19:53:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2021-10-21 19:53:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:53:01,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:01,701 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:01,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:01,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:53:01,912 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:01,912 INFO L82 PathProgramCache]: Analyzing trace with hash 395545055, now seen corresponding path program 2 times [2021-10-21 19:53:01,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:01,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484709128] [2021-10-21 19:53:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:01,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:01,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:01,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490764541] [2021-10-21 19:53:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:01,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:01,920 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:53:02,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:53:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:53:02,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:02,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484709128] [2021-10-21 19:53:02,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:02,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490764541] [2021-10-21 19:53:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490764541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:02,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:53:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855604777] [2021-10-21 19:53:02,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:53:02,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:53:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:02,313 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-10-21 19:53:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:02,454 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-10-21 19:53:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:53:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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 45 [2021-10-21 19:53:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:02,457 INFO L225 Difference]: With dead ends: 336 [2021-10-21 19:53:02,457 INFO L226 Difference]: Without dead ends: 256 [2021-10-21 19:53:02,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:53:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-21 19:53:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-10-21 19:53:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1991701244813278) internal successors, (289), 241 states have internal predecessors, (289), 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) [2021-10-21 19:53:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2021-10-21 19:53:02,489 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 45 [2021-10-21 19:53:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2021-10-21 19:53:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-10-21 19:53:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2021-10-21 19:53:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:53:02,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:02,491 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:02,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:53:02,716 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1197425055, now seen corresponding path program 3 times [2021-10-21 19:53:02,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:02,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143980512] [2021-10-21 19:53:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:02,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:02,723 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:02,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95777828] [2021-10-21 19:53:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:02,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:02,727 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:02,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:53:03,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:53:03,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:53:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:03,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:03,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143980512] [2021-10-21 19:53:03,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:03,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95777828] [2021-10-21 19:53:03,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95777828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:03,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:03,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:53:03,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104998106] [2021-10-21 19:53:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:53:03,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:53:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:53:03,374 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2021-10-21 19:53:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:03,526 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2021-10-21 19:53:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:53:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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 45 [2021-10-21 19:53:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:03,528 INFO L225 Difference]: With dead ends: 372 [2021-10-21 19:53:03,528 INFO L226 Difference]: Without dead ends: 268 [2021-10-21 19:53:03,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:53:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-21 19:53:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 252. [2021-10-21 19:53:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.199203187250996) internal successors, (301), 251 states have internal predecessors, (301), 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) [2021-10-21 19:53:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2021-10-21 19:53:03,564 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 45 [2021-10-21 19:53:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:03,565 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2021-10-21 19:53:03,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2021-10-21 19:53:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2021-10-21 19:53:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:53:03,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:03,567 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:03,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:03,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:53:03,772 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1734067016, now seen corresponding path program 2 times [2021-10-21 19:53:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196438350] [2021-10-21 19:53:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:03,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:03,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:03,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291703522] [2021-10-21 19:53:03,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:03,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:03,785 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:03,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:53:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:04,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:53:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:04,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:04,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196438350] [2021-10-21 19:53:04,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:04,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291703522] [2021-10-21 19:53:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291703522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:04,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:04,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:53:04,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642654895] [2021-10-21 19:53:04,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:53:04,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:53:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:53:04,295 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-10-21 19:53:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:04,456 INFO L93 Difference]: Finished difference Result 307 states and 365 transitions. [2021-10-21 19:53:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:53:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 47 [2021-10-21 19:53:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:04,458 INFO L225 Difference]: With dead ends: 307 [2021-10-21 19:53:04,459 INFO L226 Difference]: Without dead ends: 303 [2021-10-21 19:53:04,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-21 19:53:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-10-21 19:53:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2055335968379446) internal successors, (305), 253 states have internal predecessors, (305), 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) [2021-10-21 19:53:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 305 transitions. [2021-10-21 19:53:04,489 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 305 transitions. Word has length 47 [2021-10-21 19:53:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:04,490 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 305 transitions. [2021-10-21 19:53:04,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-10-21 19:53:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 305 transitions. [2021-10-21 19:53:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:53:04,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:04,491 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:04,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:04,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:53:04,708 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1345560826, now seen corresponding path program 3 times [2021-10-21 19:53:04,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:04,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178409236] [2021-10-21 19:53:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:04,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:04,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:04,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062021252] [2021-10-21 19:53:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:04,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:04,733 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:04,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:53:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-21 19:53:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:53:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:05,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:05,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178409236] [2021-10-21 19:53:05,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:05,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062021252] [2021-10-21 19:53:05,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062021252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:05,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:05,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:53:05,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083437248] [2021-10-21 19:53:05,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:53:05,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:53:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:53:05,410 INFO L87 Difference]: Start difference. First operand 254 states and 305 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-10-21 19:53:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:05,598 INFO L93 Difference]: Finished difference Result 360 states and 438 transitions. [2021-10-21 19:53:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:53:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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 47 [2021-10-21 19:53:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:05,600 INFO L225 Difference]: With dead ends: 360 [2021-10-21 19:53:05,601 INFO L226 Difference]: Without dead ends: 280 [2021-10-21 19:53:05,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-21 19:53:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 274. [2021-10-21 19:53:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1904761904761905) internal successors, (325), 273 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) [2021-10-21 19:53:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 325 transitions. [2021-10-21 19:53:05,646 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 325 transitions. Word has length 47 [2021-10-21 19:53:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 325 transitions. [2021-10-21 19:53:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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) [2021-10-21 19:53:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 325 transitions. [2021-10-21 19:53:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:53:05,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:05,648 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:05,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:05,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:53:05,853 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -481484301, now seen corresponding path program 4 times [2021-10-21 19:53:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:05,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311095876] [2021-10-21 19:53:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:05,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:05,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:05,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406409876] [2021-10-21 19:53:05,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:53:05,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:05,866 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:53:06,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:53:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:53:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:06,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:06,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311095876] [2021-10-21 19:53:06,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:06,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406409876] [2021-10-21 19:53:06,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406409876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:06,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:06,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:53:06,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887235105] [2021-10-21 19:53:06,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:53:06,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:53:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:53:06,422 INFO L87 Difference]: Start difference. First operand 274 states and 325 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2021-10-21 19:53:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:06,586 INFO L93 Difference]: Finished difference Result 408 states and 495 transitions. [2021-10-21 19:53:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:53:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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 49 [2021-10-21 19:53:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:06,589 INFO L225 Difference]: With dead ends: 408 [2021-10-21 19:53:06,589 INFO L226 Difference]: Without dead ends: 304 [2021-10-21 19:53:06,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:53:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-21 19:53:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2021-10-21 19:53:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.1908127208480566) internal successors, (337), 283 states have internal predecessors, (337), 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) [2021-10-21 19:53:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 337 transitions. [2021-10-21 19:53:06,623 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 337 transitions. Word has length 49 [2021-10-21 19:53:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 337 transitions. [2021-10-21 19:53:06,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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) [2021-10-21 19:53:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 337 transitions. [2021-10-21 19:53:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:53:06,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:06,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:06,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:06,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:53:06,848 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash -281596910, now seen corresponding path program 4 times [2021-10-21 19:53:06,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:06,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858957528] [2021-10-21 19:53:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:06,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:06,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:06,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667406232] [2021-10-21 19:53:06,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:53:06,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:06,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:06,857 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:53:07,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:53:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:07,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:53:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:53:07,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858957528] [2021-10-21 19:53:07,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:53:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667406232] [2021-10-21 19:53:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667406232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:07,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:07,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:53:07,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529997361] [2021-10-21 19:53:07,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:53:07,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:53:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:07,282 INFO L87 Difference]: Start difference. First operand 284 states and 337 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-10-21 19:53:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:07,353 INFO L93 Difference]: Finished difference Result 422 states and 504 transitions. [2021-10-21 19:53:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:53:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 51 [2021-10-21 19:53:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:07,356 INFO L225 Difference]: With dead ends: 422 [2021-10-21 19:53:07,356 INFO L226 Difference]: Without dead ends: 312 [2021-10-21 19:53:07,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-21 19:53:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 296. [2021-10-21 19:53:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.193220338983051) internal successors, (352), 295 states have internal predecessors, (352), 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) [2021-10-21 19:53:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 352 transitions. [2021-10-21 19:53:07,390 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 352 transitions. Word has length 51 [2021-10-21 19:53:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:07,390 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 352 transitions. [2021-10-21 19:53:07,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-10-21 19:53:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 352 transitions. [2021-10-21 19:53:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:53:07,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:07,392 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:07,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:07,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:07,609 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-21 19:53:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -258254836, now seen corresponding path program 3 times [2021-10-21 19:53:07,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:07,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124429303] [2021-10-21 19:53:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:07,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:07,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:53:07,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920658905] [2021-10-21 19:53:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:07,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:07,617 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:07,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:53:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:53:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:53:08,196 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:53:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:53:08,262 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:53:08,262 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:53:08,263 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:53:08,265 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:53:08,265 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:53:08,265 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:53:08,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:08,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:53:08,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:53:08 BoogieIcfgContainer [2021-10-21 19:53:08,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:53:08,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:53:08,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:53:08,531 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:53:08,532 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:52:39" (3/4) ... [2021-10-21 19:53:08,533 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:53:08,630 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:53:08,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:53:08,632 INFO L168 Benchmark]: Toolchain (without parser) took 29509.65 ms. Allocated memory was 86.0 MB in the beginning and 132.1 MB in the end (delta: 46.1 MB). Free memory was 48.9 MB in the beginning and 49.1 MB in the end (delta: -197.5 kB). Peak memory consumption was 45.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,632 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:53:08,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.41 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 48.7 MB in the beginning and 85.4 MB in the end (delta: -36.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.43 ms. Allocated memory is still 109.1 MB. Free memory was 85.4 MB in the beginning and 83.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,634 INFO L168 Benchmark]: Boogie Preprocessor took 24.38 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,634 INFO L168 Benchmark]: RCFGBuilder took 367.67 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 71.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,635 INFO L168 Benchmark]: TraceAbstraction took 28709.22 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 70.7 MB in the beginning and 53.3 MB in the end (delta: 17.4 MB). Peak memory consumption was 43.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,635 INFO L168 Benchmark]: Witness Printer took 99.56 ms. Allocated memory is still 132.1 MB. Free memory was 53.3 MB in the beginning and 49.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:08,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.41 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 48.7 MB in the beginning and 85.4 MB in the end (delta: -36.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.43 ms. Allocated memory is still 109.1 MB. Free memory was 85.4 MB in the beginning and 83.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.38 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 367.67 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 71.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28709.22 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 70.7 MB in the beginning and 53.3 MB in the end (delta: 17.4 MB). Peak memory consumption was 43.5 MB. Max. memory is 16.1 GB. * Witness Printer took 99.56 ms. Allocated memory is still 132.1 MB. Free memory was 53.3 MB in the beginning and 49.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=3] [L47] EXPR counter++ VAL [counter=4] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND TRUE !(r < 0) VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(r != 0)) VAL [counter=5] [L39] EXPR counter++ VAL [counter=6] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=6] [L39] EXPR counter++ VAL [counter=7] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=7] [L39] EXPR counter++ VAL [counter=8] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L41] COND TRUE !(r > 0) VAL [counter=8] [L47] EXPR counter++ VAL [counter=9] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=9] [L47] EXPR counter++ VAL [counter=10] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L49] COND TRUE !(r < 0) VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L12] COND TRUE !(cond) VAL [counter=11] [L14] reach_error() VAL [counter=11] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 28596.7ms, OverallIterations: 31, TraceHistogramMax: 5, EmptinessCheckTime: 39.2ms, AutomataDifference: 9510.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 750 SDtfs, 1493 SDslu, 2197 SDs, 0 SdLazy, 888 SolverSat, 488 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7752.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1425.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=296occurred in iteration=30, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 573.7ms AutomataMinimizationTime, 30 MinimizatonAttempts, 264 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 223.2ms SsaConstructionTime, 1653.7ms SatisfiabilityAnalysisTime, 4560.1ms InterpolantComputationTime, 1017 NumberOfCodeBlocks, 1015 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 936 ConstructedInterpolants, 0 QuantifiedInterpolants, 2548 SizeOfPredicates, 135 NumberOfNonLiveVariables, 3989 ConjunctsInSsa, 344 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 160/626 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:53:08,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44deeb31-0627-4601-bd1f-0c486616b8e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...