./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:08:04,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:08:04,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:08:04,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:08:04,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:08:04,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:08:04,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:08:04,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:08:04,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:08:04,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:08:04,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:08:04,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:08:04,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:08:04,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:08:04,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:08:04,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:08:04,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:08:04,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:08:04,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:08:05,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:08:05,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:08:05,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:08:05,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:08:05,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:08:05,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:08:05,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:08:05,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:08:05,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:08:05,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:08:05,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:08:05,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:08:05,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:08:05,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:08:05,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:08:05,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:08:05,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:08:05,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:08:05,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:08:05,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:08:05,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:08:05,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:08:05,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:08:05,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:08:05,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:08:05,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:08:05,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:08:05,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:08:05,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:08:05,084 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:08:05,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:08:05,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:08:05,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:08:05,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:08:05,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:08:05,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:08:05,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:08:05,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:08:05,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:08:05,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:08:05,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:08:05,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:08:05,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:08:05,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:08:05,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:08:05,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:08:05,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:08:05,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:08:05,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:08:05,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:08:05,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:08:05,096 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:08:05,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:08:05,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:08:05,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:08:05,097 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_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2021-11-22 16:08:05,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:08:05,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:08:05,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:08:05,435 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:08:05,436 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:08:05,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-11-22 16:08:05,541 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/data/24dd12afd/307a7ffd85cf46f29edd27499c065ebe/FLAG40d306a7c [2021-11-22 16:08:06,120 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:08:06,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-11-22 16:08:06,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/data/24dd12afd/307a7ffd85cf46f29edd27499c065ebe/FLAG40d306a7c [2021-11-22 16:08:06,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/data/24dd12afd/307a7ffd85cf46f29edd27499c065ebe [2021-11-22 16:08:06,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:08:06,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:08:06,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:08:06,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:08:06,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:08:06,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722a92e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06, skipping insertion in model container [2021-11-22 16:08:06,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:08:06,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:08:06,717 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-11-22 16:08:06,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:08:06,743 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:08:06,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-11-22 16:08:06,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:08:06,781 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:08:06,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06 WrapperNode [2021-11-22 16:08:06,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:08:06,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:08:06,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:08:06,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:08:06,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,827 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 54 [2021-11-22 16:08:06,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:08:06,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:08:06,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:08:06,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:08:06,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:08:06,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:08:06,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:08:06,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:08:06,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (1/1) ... [2021-11-22 16:08:06,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:08:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:06,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:08:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:08:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:08:06,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:08:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:08:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:08:07,047 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:08:07,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:08:07,257 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:08:07,265 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:08:07,266 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:08:07,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:08:07 BoogieIcfgContainer [2021-11-22 16:08:07,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:08:07,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:08:07,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:08:07,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:08:07,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:08:06" (1/3) ... [2021-11-22 16:08:07,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5599cfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:08:07, skipping insertion in model container [2021-11-22 16:08:07,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:08:06" (2/3) ... [2021-11-22 16:08:07,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5599cfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:08:07, skipping insertion in model container [2021-11-22 16:08:07,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:08:07" (3/3) ... [2021-11-22 16:08:07,280 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2021-11-22 16:08:07,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:08:07,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-22 16:08:07,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:08:07,358 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:08:07,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 16:08:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:08:07,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:07,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:08:07,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-22 16:08:07,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:07,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271244254] [2021-11-22 16:08:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:07,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:07,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849921964] [2021-11-22 16:08:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:07,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:07,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:08:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:08:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:07,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:08:07,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271244254] [2021-11-22 16:08:07,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849921964] [2021-11-22 16:08:07,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849921964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:08:07,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:08:07,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:08:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967604176] [2021-11-22 16:08:07,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:08:07,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:08:07,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:08:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:08:07,922 INFO L87 Difference]: Start difference. First operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 20 states have internal predecessors, (26), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:08,552 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-11-22 16:08:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:08:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-22 16:08:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:08,566 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:08:08,566 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 16:08:08,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:08:08,587 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 16:08:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 16:08:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-22 16:08:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-22 16:08:08,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 6 [2021-11-22 16:08:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:08,643 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-22 16:08:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-22 16:08:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:08:08,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:08,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:08,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:08,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:08,859 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 662417944, now seen corresponding path program 1 times [2021-11-22 16:08:08,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404340911] [2021-11-22 16:08:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:08,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:08,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:08,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367769895] [2021-11-22 16:08:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:08,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:08,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:08,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:08:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:08:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:09,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:08:09,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:09,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404340911] [2021-11-22 16:08:09,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:09,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367769895] [2021-11-22 16:08:09,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367769895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:09,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:09,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-22 16:08:09,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214319579] [2021-11-22 16:08:09,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:09,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:08:09,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:08:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:08:09,500 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:09,646 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-22 16:08:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:08:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 [2021-11-22 16:08:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:09,649 INFO L225 Difference]: With dead ends: 33 [2021-11-22 16:08:09,650 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 16:08:09,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:08:09,653 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:09,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 31 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:08:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 16:08:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-22 16:08:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-22 16:08:09,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-22 16:08:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:09,671 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-22 16:08:09,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-22 16:08:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 16:08:09,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:09,673 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:09,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:09,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:09,883 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -939922866, now seen corresponding path program 1 times [2021-11-22 16:08:09,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:09,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148377092] [2021-11-22 16:08:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:09,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:09,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:09,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29024684] [2021-11-22 16:08:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:09,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:09,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:09,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:08:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:08:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:10,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:10,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:10,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148377092] [2021-11-22 16:08:10,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:10,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29024684] [2021-11-22 16:08:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29024684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:10,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:10,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-22 16:08:10,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130655766] [2021-11-22 16:08:10,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:08:10,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:08:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:08:10,075 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:10,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:10,139 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-22 16:08:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:08:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 12 [2021-11-22 16:08:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:10,140 INFO L225 Difference]: With dead ends: 40 [2021-11-22 16:08:10,141 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 16:08:10,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:08:10,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:10,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:08:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 16:08:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-11-22 16:08:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-11-22 16:08:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-22 16:08:10,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-11-22 16:08:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:10,165 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-22 16:08:10,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-22 16:08:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 16:08:10,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:10,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:10,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:10,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:10,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash -930218911, now seen corresponding path program 1 times [2021-11-22 16:08:10,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:10,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842154007] [2021-11-22 16:08:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:10,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:10,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928557454] [2021-11-22 16:08:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:10,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:10,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:10,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:08:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:08:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:10,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:11,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842154007] [2021-11-22 16:08:11,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:11,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928557454] [2021-11-22 16:08:11,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928557454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:11,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:11,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-22 16:08:11,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758244480] [2021-11-22 16:08:11,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:11,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:08:11,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:08:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:08:11,127 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:11,224 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-22 16:08:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:08:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 15 [2021-11-22 16:08:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:11,227 INFO L225 Difference]: With dead ends: 32 [2021-11-22 16:08:11,227 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 16:08:11,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:08:11,240 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:11,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2021-11-22 16:08:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 16:08:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-22 16:08:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-22 16:08:11,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-11-22 16:08:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:11,260 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-22 16:08:11,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-22 16:08:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:08:11,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:11,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:11,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:11,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-22 16:08:11,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1501546963, now seen corresponding path program 2 times [2021-11-22 16:08:11,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:11,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019591032] [2021-11-22 16:08:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:11,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:11,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497447609] [2021-11-22 16:08:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:08:11,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:11,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:11,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:08:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:08:11,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:08:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:08:11,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:11,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:12,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:12,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019591032] [2021-11-22 16:08:12,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497447609] [2021-11-22 16:08:12,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497447609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:12,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:12,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-22 16:08:12,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582836429] [2021-11-22 16:08:12,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:12,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:08:12,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:08:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:08:12,340 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:12,616 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-11-22 16:08:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:08:12,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20 [2021-11-22 16:08:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:12,619 INFO L225 Difference]: With dead ends: 46 [2021-11-22 16:08:12,619 INFO L226 Difference]: Without dead ends: 40 [2021-11-22 16:08:12,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:08:12,620 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:12,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-22 16:08:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-22 16:08:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-11-22 16:08:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-11-22 16:08:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-22 16:08:12,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2021-11-22 16:08:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:12,635 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-22 16:08:12,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-22 16:08:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:08:12,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:12,637 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:12,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:12,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:12,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1003891036, now seen corresponding path program 2 times [2021-11-22 16:08:12,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428093796] [2021-11-22 16:08:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:12,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:12,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:12,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289470437] [2021-11-22 16:08:12,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:08:12,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:12,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:12,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:08:12,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:08:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:08:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:08:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:13,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:13,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428093796] [2021-11-22 16:08:13,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289470437] [2021-11-22 16:08:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289470437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:13,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:13,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-22 16:08:13,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766609000] [2021-11-22 16:08:13,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:13,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:08:13,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:08:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:08:13,261 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-11-22 16:08:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:13,484 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-11-22 16:08:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:08:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) Word has length 27 [2021-11-22 16:08:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:13,494 INFO L225 Difference]: With dead ends: 78 [2021-11-22 16:08:13,494 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 16:08:13,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:08:13,497 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:13,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:08:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 16:08:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-11-22 16:08:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-22 16:08:13,524 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 27 [2021-11-22 16:08:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:13,525 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-22 16:08:13,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-11-22 16:08:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-22 16:08:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:08:13,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:13,531 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:13,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:13,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:13,751 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 610999009, now seen corresponding path program 3 times [2021-11-22 16:08:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147783319] [2021-11-22 16:08:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:13,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:13,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:13,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679691327] [2021-11-22 16:08:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:08:13,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:13,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:08:14,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-22 16:08:14,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:08:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 16:08:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:15,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:15,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147783319] [2021-11-22 16:08:15,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679691327] [2021-11-22 16:08:15,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679691327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:15,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:15,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-22 16:08:15,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925736737] [2021-11-22 16:08:15,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:15,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:08:15,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:08:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:08:15,820 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-11-22 16:08:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:17,441 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-11-22 16:08:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:08:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) Word has length 35 [2021-11-22 16:08:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:17,444 INFO L225 Difference]: With dead ends: 64 [2021-11-22 16:08:17,444 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 16:08:17,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:08:17,446 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:17,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 200 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 24 Unchecked, 0.7s Time] [2021-11-22 16:08:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 16:08:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 16:08:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 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) [2021-11-22 16:08:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-11-22 16:08:17,462 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 35 [2021-11-22 16:08:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:17,463 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-11-22 16:08:17,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-11-22 16:08:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-11-22 16:08:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:08:17,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:17,466 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:17,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:17,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:17,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 149757724, now seen corresponding path program 3 times [2021-11-22 16:08:17,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601612253] [2021-11-22 16:08:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:17,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:17,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687057039] [2021-11-22 16:08:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:08:17,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:17,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:17,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:08:18,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 16:08:18,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:08:18,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-22 16:08:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:19,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601612253] [2021-11-22 16:08:19,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687057039] [2021-11-22 16:08:19,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687057039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:19,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:19,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-22 16:08:19,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759738802] [2021-11-22 16:08:19,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:19,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 16:08:19,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 16:08:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-11-22 16:08:19,385 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:19,876 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2021-11-22 16:08:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 16:08:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 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 57 [2021-11-22 16:08:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:19,878 INFO L225 Difference]: With dead ends: 122 [2021-11-22 16:08:19,878 INFO L226 Difference]: Without dead ends: 118 [2021-11-22 16:08:19,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 16:08:19,881 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:19,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:08:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-22 16:08:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-22 16:08:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-11-22 16:08:19,925 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 57 [2021-11-22 16:08:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:19,925 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-11-22 16:08:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-11-22 16:08:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-22 16:08:19,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:19,928 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:19,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:20,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 16:08:20,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1151949468, now seen corresponding path program 4 times [2021-11-22 16:08:20,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:20,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351275710] [2021-11-22 16:08:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:20,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:20,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:20,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294120529] [2021-11-22 16:08:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:08:20,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:20,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:20,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:08:20,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:08:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:08:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-22 16:08:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:21,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:22,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:08:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351275710] [2021-11-22 16:08:22,428 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:08:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294120529] [2021-11-22 16:08:22,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294120529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:22,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:22,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-22 16:08:22,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587963321] [2021-11-22 16:08:22,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:22,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 16:08:22,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:08:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 16:08:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 16:08:22,441 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 50 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:24,012 INFO L93 Difference]: Finished difference Result 242 states and 265 transitions. [2021-11-22 16:08:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-22 16:08:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 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 117 [2021-11-22 16:08:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:24,015 INFO L225 Difference]: With dead ends: 242 [2021-11-22 16:08:24,015 INFO L226 Difference]: Without dead ends: 238 [2021-11-22 16:08:24,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:08:24,022 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:24,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 185 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:08:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-22 16:08:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-22 16:08:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0042194092827004) internal successors, (238), 237 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2021-11-22 16:08:24,082 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 117 [2021-11-22 16:08:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:24,083 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2021-11-22 16:08:24,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2021-11-22 16:08:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-22 16:08:24,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:24,088 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-22 16:08:24,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:24,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 16:08:24,294 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:08:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:24,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1721036388, now seen corresponding path program 5 times [2021-11-22 16:08:24,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:08:24,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249340442] [2021-11-22 16:08:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:24,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:08:24,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:08:24,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002605300] [2021-11-22 16:08:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:08:24,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:08:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:08:24,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:08:24,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63926357-fb58-4524-9063-052ca8c06ac7/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process