./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX --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 ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:50:53,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:50:53,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:50:53,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:50:53,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:50:53,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:50:53,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:50:53,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:50:53,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:50:53,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:50:53,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:50:53,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:50:53,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:50:53,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:50:53,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:50:53,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:50:53,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:50:53,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:50:53,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:50:53,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:50:53,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:50:53,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:50:53,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:50:53,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:50:53,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:50:53,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:50:53,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:50:53,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:50:53,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:50:53,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:50:53,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:50:53,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:50:53,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:50:53,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:50:53,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:50:53,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:50:53,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:50:53,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:50:53,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:50:53,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:50:53,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:50:53,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:50:53,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:50:53,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:50:53,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:50:53,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:50:53,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:50:53,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:50:53,714 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:50:53,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:50:53,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:50:53,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:50:53,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:50:53,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:50:53,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:50:53,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:50:53,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:50:53,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:50:53,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:50:53,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:50:53,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:50:53,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:50:53,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:50:53,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:50:53,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:53,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:50:53,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:50:53,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:50:53,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:50:53,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:50:53,721 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:50:53,721 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:50:53,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:50:53,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:50:53,722 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_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec2a850a3cd9252437037b0e2bf289d9622078bb11b0dcb40fb1cb3d7147f7c5 [2021-11-09 09:50:54,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:50:54,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:50:54,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:50:54,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:50:54,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:50:54,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-11-09 09:50:54,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/data/9ca900e44/c5e1d81b11714c678578cb24317ba784/FLAG6355c1e40 [2021-11-09 09:50:54,584 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:50:54,585 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-11-09 09:50:54,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/data/9ca900e44/c5e1d81b11714c678578cb24317ba784/FLAG6355c1e40 [2021-11-09 09:50:54,606 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/data/9ca900e44/c5e1d81b11714c678578cb24317ba784 [2021-11-09 09:50:54,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:50:54,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:50:54,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:54,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:50:54,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:50:54,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eaecc37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54, skipping insertion in model container [2021-11-09 09:50:54,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:50:54,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:50:54,834 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_05fd3bac-97ea-4d14-86d4-f31202decfb5/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2021-11-09 09:50:54,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:54,871 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:50:54,883 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_05fd3bac-97ea-4d14-86d4-f31202decfb5/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2021-11-09 09:50:54,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:54,912 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:50:54,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54 WrapperNode [2021-11-09 09:50:54,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:54,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:54,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:50:54,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:50:54,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:54,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:50:54,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:50:54,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:50:54,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:54,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:50:54,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:50:54,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:50:54,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:50:54,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (1/1) ... [2021-11-09 09:50:55,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:55,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:50:55,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:50:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:50:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:50:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:50:55,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:50:57,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:50:57,671 INFO L299 CfgBuilder]: Removed 28 assume(true) statements. [2021-11-09 09:50:57,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:57 BoogieIcfgContainer [2021-11-09 09:50:57,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:50:57,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:50:57,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:50:57,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:50:57,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:50:54" (1/3) ... [2021-11-09 09:50:57,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702a11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:57, skipping insertion in model container [2021-11-09 09:50:57,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:54" (2/3) ... [2021-11-09 09:50:57,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702a11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:57, skipping insertion in model container [2021-11-09 09:50:57,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:57" (3/3) ... [2021-11-09 09:50:57,682 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2021-11-09 09:50:57,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:50:57,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-09 09:50:57,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:50:57,743 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:50:57,743 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-09 09:50:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 40 states have (on average 1.675) internal successors, (67), 49 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) [2021-11-09 09:50:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:50:57,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:57,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:57,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:50:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1235857098, now seen corresponding path program 1 times [2021-11-09 09:50:57,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:57,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481794519] [2021-11-09 09:50:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:57,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481794519] [2021-11-09 09:50:58,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481794519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:58,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:58,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:58,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691682794] [2021-11-09 09:50:58,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:50:58,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:50:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:58,036 INFO L87 Difference]: Start difference. First operand has 50 states, 40 states have (on average 1.675) internal successors, (67), 49 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) 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) [2021-11-09 09:50:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:58,062 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2021-11-09 09:50:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:50:58,063 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 [2021-11-09 09:50:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:58,075 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:50:58,075 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 09:50:58,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:50:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 09:50:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-09 09:50:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-09 09:50:58,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 10 [2021-11-09 09:50:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:58,119 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-09 09:50:58,120 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) [2021-11-09 09:50:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-09 09:50:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:50:58,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:58,122 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:58,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:50:58,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:50:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1503620767, now seen corresponding path program 1 times [2021-11-09 09:50:58,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:58,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145267633] [2021-11-09 09:50:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:58,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:58,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:58,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145267633] [2021-11-09 09:50:58,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145267633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:58,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:58,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:50:58,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900243198] [2021-11-09 09:50:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:50:58,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:50:58,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:50:58,588 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-11-09 09:51:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:04,299 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-09 09:51:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:51:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-11-09 09:51:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:04,314 INFO L225 Difference]: With dead ends: 122 [2021-11-09 09:51:04,314 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 09:51:04,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 09:51:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2021-11-09 09:51:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-11-09 09:51:04,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 11 [2021-11-09 09:51:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:04,348 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-11-09 09:51:04,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-11-09 09:51:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-11-09 09:51:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:51:04,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:04,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:51:04,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:51:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1870389148, now seen corresponding path program 1 times [2021-11-09 09:51:04,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:04,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542324218] [2021-11-09 09:51:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:04,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:04,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:04,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707276231] [2021-11-09 09:51:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:04,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:04,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:04,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:51:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:51:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:04,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:04,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542324218] [2021-11-09 09:51:04,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:04,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707276231] [2021-11-09 09:51:04,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707276231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:04,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:04,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:04,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671924888] [2021-11-09 09:51:04,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:51:04,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:51:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:04,566 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-09 09:51:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:06,156 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-09 09:51:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:51:06,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2021-11-09 09:51:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:06,158 INFO L225 Difference]: With dead ends: 101 [2021-11-09 09:51:06,158 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 09:51:06,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 09:51:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-11-09 09:51:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.25) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2021-11-09 09:51:06,174 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 13 [2021-11-09 09:51:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:06,175 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2021-11-09 09:51:06,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-09 09:51:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2021-11-09 09:51:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:51:06,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:06,176 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:06,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:06,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:51:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1828543716, now seen corresponding path program 1 times [2021-11-09 09:51:06,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:06,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134977451] [2021-11-09 09:51:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:06,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:06,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:06,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134977451] [2021-11-09 09:51:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134977451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:06,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103404598] [2021-11-09 09:51:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:06,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:06,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:06,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:51:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:51:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103404598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:06,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:06,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:51:06,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807976925] [2021-11-09 09:51:06,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:51:06,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:51:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:51:06,981 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:17,322 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-11-09 09:51:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:51:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 [2021-11-09 09:51:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:17,325 INFO L225 Difference]: With dead ends: 128 [2021-11-09 09:51:17,325 INFO L226 Difference]: Without dead ends: 122 [2021-11-09 09:51:17,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:51:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-09 09:51:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-11-09 09:51:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.223529411764706) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-09 09:51:17,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 13 [2021-11-09 09:51:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:17,343 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-09 09:51:17,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-09 09:51:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:51:17,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:17,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:17,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:17,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:17,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:51:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2147482631, now seen corresponding path program 1 times [2021-11-09 09:51:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:17,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60520453] [2021-11-09 09:51:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:17,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:17,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:17,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961079520] [2021-11-09 09:51:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:17,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:17,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:17,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:17,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:51:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:51:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:17,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:17,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60520453] [2021-11-09 09:51:17,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:51:17,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961079520] [2021-11-09 09:51:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961079520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:17,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:17,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:51:17,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931341751] [2021-11-09 09:51:17,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:51:17,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:51:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:51:17,875 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:20,924 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-09 09:51:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:51:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:51:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:20,926 INFO L225 Difference]: With dead ends: 111 [2021-11-09 09:51:20,926 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 09:51:20,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:51:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 09:51:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-11-09 09:51:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-09 09:51:20,938 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2021-11-09 09:51:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:20,939 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-09 09:51:20,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-09 09:51:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:51:20,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:20,940 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:20,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 09:51:21,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:21,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-09 09:51:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash -957581047, now seen corresponding path program 1 times [2021-11-09 09:51:21,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:21,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580276231] [2021-11-09 09:51:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:21,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:21,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:51:21,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477855245] [2021-11-09 09:51:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:21,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:21,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:21,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:21,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05fd3bac-97ea-4d14-86d4-f31202decfb5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process