./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer --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 588393c4cc7a9592019e246f0b8ee7264f8dd86a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:39:35,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:39:35,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:39:35,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:39:35,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:39:35,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:39:35,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:39:35,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:39:35,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:39:35,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:39:35,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:39:35,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:39:35,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:39:35,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:39:35,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:39:35,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:39:35,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:39:35,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:39:35,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:39:35,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:39:35,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:39:35,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:39:35,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:39:35,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:39:35,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:39:35,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:39:35,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:39:35,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:39:35,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:39:35,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:39:35,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:39:35,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:39:35,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:39:35,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:39:35,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:39:35,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:39:35,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:39:35,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:39:35,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:39:35,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:39:35,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:39:35,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:39:35,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:39:35,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:39:35,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:39:35,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:39:35,816 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:39:35,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:39:35,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:39:35,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:39:35,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:39:35,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:39:35,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:39:35,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:39:35,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:39:35,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:39:35,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:39:35,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:39:35,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:39:35,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:39:35,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:39:35,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:39:35,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:39:35,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:39:35,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:39:35,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:39:35,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:39:35,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:39:35,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:39:35,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:39:35,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:39:35,823 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-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588393c4cc7a9592019e246f0b8ee7264f8dd86a [2020-11-29 20:39:36,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:39:36,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:39:36,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:39:36,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:39:36,153 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:39:36,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o10.c [2020-11-29 20:39:36,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/data/69e2f56fa/458137ee6d8842bdbd5c76be1dc1c8f9/FLAG58aabe932 [2020-11-29 20:39:36,819 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:39:36,820 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/sv-benchmarks/c/recursive-simple/id_o10.c [2020-11-29 20:39:36,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/data/69e2f56fa/458137ee6d8842bdbd5c76be1dc1c8f9/FLAG58aabe932 [2020-11-29 20:39:37,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/data/69e2f56fa/458137ee6d8842bdbd5c76be1dc1c8f9 [2020-11-29 20:39:37,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:39:37,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:39:37,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:39:37,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:39:37,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:39:37,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3c9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37, skipping insertion in model container [2020-11-29 20:39:37,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:39:37,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:39:37,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:39:37,485 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:39:37,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:39:37,516 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:39:37,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37 WrapperNode [2020-11-29 20:39:37,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:39:37,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:39:37,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:39:37,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:39:37,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:39:37,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:39:37,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:39:37,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:39:37,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... [2020-11-29 20:39:37,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:39:37,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:39:37,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:39:37,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:39:37,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:39:37,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:39:37,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:39:37,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:39:37,661 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-29 20:39:37,662 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-29 20:39:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:39:37,961 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:39:37,961 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 20:39:37,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:39:37 BoogieIcfgContainer [2020-11-29 20:39:37,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:39:37,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:39:37,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:39:37,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:39:37,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:39:37" (1/3) ... [2020-11-29 20:39:37,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c386e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:39:37, skipping insertion in model container [2020-11-29 20:39:37,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:39:37" (2/3) ... [2020-11-29 20:39:37,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c386e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:39:37, skipping insertion in model container [2020-11-29 20:39:37,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:39:37" (3/3) ... [2020-11-29 20:39:37,972 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-11-29 20:39:37,986 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:39:37,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:39:38,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:39:38,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:39:38,034 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:39:38,034 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:39:38,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:39:38,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:39:38,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:39:38,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:39:38,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:39:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 20:39:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:39:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:38,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:38,062 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-29 20:39:38,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:38,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870479549] [2020-11-29 20:39:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:39:38,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870479549] [2020-11-29 20:39:38,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:39:38,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:39:38,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710005209] [2020-11-29 20:39:38,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:39:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:39:38,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:39:38,429 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-29 20:39:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:38,504 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-29 20:39:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:39:38,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 20:39:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:38,523 INFO L225 Difference]: With dead ends: 29 [2020-11-29 20:39:38,524 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 20:39:38,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:39:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 20:39:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 20:39:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 20:39:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-29 20:39:38,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-29 20:39:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:38,575 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-29 20:39:38,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:39:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-29 20:39:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:39:38,578 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:38,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:38,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:39:38,580 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-29 20:39:38,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:38,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830775806] [2020-11-29 20:39:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:39:38,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830775806] [2020-11-29 20:39:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924370395] [2020-11-29 20:39:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:38,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:39:38,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:39:39,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 20:39:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395399013] [2020-11-29 20:39:39,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:39:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:39:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:39:39,118 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-29 20:39:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:39,190 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-29 20:39:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:39:39,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-29 20:39:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:39,192 INFO L225 Difference]: With dead ends: 22 [2020-11-29 20:39:39,192 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 20:39:39,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:39:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 20:39:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 20:39:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 20:39:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 20:39:39,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-29 20:39:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:39,198 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 20:39:39,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:39:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 20:39:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:39:39,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:39,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:39,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 20:39:39,412 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-29 20:39:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:39,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123472644] [2020-11-29 20:39:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:39:39,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123472644] [2020-11-29 20:39:39,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422585301] [2020-11-29 20:39:39,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:39,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:39:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:39:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:39:39,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:39,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:39:39,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127850936] [2020-11-29 20:39:39,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:39:39,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:39,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:39:39,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:39:39,859 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-11-29 20:39:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:39,928 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 20:39:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:39:39,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-29 20:39:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:39,930 INFO L225 Difference]: With dead ends: 25 [2020-11-29 20:39:39,930 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 20:39:39,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:39:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 20:39:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 20:39:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 20:39:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-29 20:39:39,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-29 20:39:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:39,938 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 20:39:39,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:39:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-29 20:39:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:39:39,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:39,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:40,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:40,143 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-29 20:39:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:40,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276355047] [2020-11-29 20:39:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:39:40,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276355047] [2020-11-29 20:39:40,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313472537] [2020-11-29 20:39:40,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:40,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:39:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:40,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:39:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:39:40,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:40,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 20:39:40,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615789650] [2020-11-29 20:39:40,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:39:40,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:39:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:39:40,600 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 12 states. [2020-11-29 20:39:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:40,674 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 20:39:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:39:40,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-11-29 20:39:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:40,676 INFO L225 Difference]: With dead ends: 28 [2020-11-29 20:39:40,676 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 20:39:40,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:39:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 20:39:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 20:39:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:39:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 20:39:40,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-29 20:39:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:40,683 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 20:39:40,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:39:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 20:39:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:39:40,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:40,685 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:40,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:40,886 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-29 20:39:40,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:40,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907530542] [2020-11-29 20:39:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:40,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:39:41,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907530542] [2020-11-29 20:39:41,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939697852] [2020-11-29 20:39:41,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:41,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:39:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 20:39:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:39:41,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:41,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 20:39:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71301760] [2020-11-29 20:39:41,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:39:41,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:41,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:39:41,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:39:41,388 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2020-11-29 20:39:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:41,478 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-29 20:39:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:39:41,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-11-29 20:39:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:41,480 INFO L225 Difference]: With dead ends: 31 [2020-11-29 20:39:41,480 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 20:39:41,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:39:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 20:39:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 20:39:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 20:39:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 20:39:41,494 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-29 20:39:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:41,494 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 20:39:41,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:39:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 20:39:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:39:41,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:41,497 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:41,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:41,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-29 20:39:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:41,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966883829] [2020-11-29 20:39:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 20:39:42,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966883829] [2020-11-29 20:39:42,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523485538] [2020-11-29 20:39:42,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:42,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 20:39:42,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:39:42,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 20:39:42,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:42,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 20:39:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420013312] [2020-11-29 20:39:42,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:39:42,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:39:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:39:42,362 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 16 states. [2020-11-29 20:39:42,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:42,479 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 20:39:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:39:42,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-11-29 20:39:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:42,481 INFO L225 Difference]: With dead ends: 34 [2020-11-29 20:39:42,481 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 20:39:42,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:39:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 20:39:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-29 20:39:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 20:39:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 20:39:42,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-29 20:39:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:42,488 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 20:39:42,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:39:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 20:39:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:39:42,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:42,495 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:42,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 20:39:42,696 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:42,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-29 20:39:42,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:42,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311940412] [2020-11-29 20:39:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:42,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 20:39:43,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311940412] [2020-11-29 20:39:43,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980439736] [2020-11-29 20:39:43,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:43,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 20:39:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:39:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 20:39:43,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:43,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 20:39:43,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198684805] [2020-11-29 20:39:43,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:39:43,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:39:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:39:43,286 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 18 states. [2020-11-29 20:39:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:43,427 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-29 20:39:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:39:43,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-11-29 20:39:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:43,430 INFO L225 Difference]: With dead ends: 37 [2020-11-29 20:39:43,430 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 20:39:43,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:39:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 20:39:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 20:39:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 20:39:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-29 20:39:43,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-29 20:39:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:43,437 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-29 20:39:43,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:39:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-29 20:39:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 20:39:43,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:43,438 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:43,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:43,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-29 20:39:43,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:43,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197164449] [2020-11-29 20:39:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:43,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 20:39:44,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197164449] [2020-11-29 20:39:44,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012507506] [2020-11-29 20:39:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 20:39:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 20:39:44,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:44,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 20:39:44,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313404912] [2020-11-29 20:39:44,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:39:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:39:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:39:44,311 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2020-11-29 20:39:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:44,512 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-29 20:39:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:39:44,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-11-29 20:39:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:44,514 INFO L225 Difference]: With dead ends: 40 [2020-11-29 20:39:44,514 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 20:39:44,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:39:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 20:39:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 20:39:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 20:39:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 20:39:44,522 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-29 20:39:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 20:39:44,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:39:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 20:39:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 20:39:44,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:44,524 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:44,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:44,740 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-29 20:39:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:44,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811348483] [2020-11-29 20:39:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:44,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 20:39:45,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811348483] [2020-11-29 20:39:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018859157] [2020-11-29 20:39:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:45,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:39:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 20:39:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 20:39:45,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:45,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 20:39:45,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903442098] [2020-11-29 20:39:45,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:39:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:39:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:39:45,491 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 22 states. [2020-11-29 20:39:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:45,697 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-29 20:39:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:39:45,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-11-29 20:39:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:45,701 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:39:45,701 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 20:39:45,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:39:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 20:39:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 20:39:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 20:39:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-29 20:39:45,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-29 20:39:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:45,707 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-29 20:39:45,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:39:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-29 20:39:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-29 20:39:45,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:45,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:45,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 20:39:45,929 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-29 20:39:45,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:45,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732678201] [2020-11-29 20:39:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:45,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:39:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:39:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 20:39:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732678201] [2020-11-29 20:39:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411283892] [2020-11-29 20:39:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 20:39:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:39:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:39:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:39:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 20:39:46,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:39:46,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-29 20:39:46,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196441732] [2020-11-29 20:39:46,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:39:46,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:39:46,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:39:46,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:39:46,913 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 24 states. [2020-11-29 20:39:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:39:47,153 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-29 20:39:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:39:47,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-11-29 20:39:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:39:47,155 INFO L225 Difference]: With dead ends: 46 [2020-11-29 20:39:47,156 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 20:39:47,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:39:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 20:39:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 20:39:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:39:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-29 20:39:47,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-29 20:39:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:39:47,162 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-29 20:39:47,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:39:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-29 20:39:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-29 20:39:47,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:39:47,171 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:39:47,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:39:47,371 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:39:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:39:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-29 20:39:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:39:47,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111446226] [2020-11-29 20:39:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:39:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:39:47,449 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:39:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:39:47,479 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:39:47,506 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:39:47,506 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:39:47,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 20:39:47,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:39:47 BoogieIcfgContainer [2020-11-29 20:39:47,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:39:47,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:39:47,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:39:47,557 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:39:47,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:39:37" (3/4) ... [2020-11-29 20:39:47,559 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:39:47,649 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_87856042-da63-4622-9f43-69ffa6298510/bin/uautomizer/witness.graphml [2020-11-29 20:39:47,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:39:47,651 INFO L168 Benchmark]: Toolchain (without parser) took 10433.65 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 89.4 MB in the beginning and 131.8 MB in the end (delta: -42.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:39:47,651 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:39:47,651 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.33 ms. Allocated memory is still 119.5 MB. Free memory was 88.9 MB in the beginning and 97.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:39:47,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.62 ms. Allocated memory is still 119.5 MB. Free memory was 97.8 MB in the beginning and 96.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:39:47,652 INFO L168 Benchmark]: Boogie Preprocessor took 28.32 ms. Allocated memory is still 119.5 MB. Free memory was 96.4 MB in the beginning and 95.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:39:47,653 INFO L168 Benchmark]: RCFGBuilder took 378.03 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 83.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:39:47,653 INFO L168 Benchmark]: TraceAbstraction took 9590.61 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 83.9 MB in the beginning and 136.0 MB in the end (delta: -52.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:39:47,653 INFO L168 Benchmark]: Witness Printer took 92.99 ms. Allocated memory is still 174.1 MB. Free memory was 134.9 MB in the beginning and 131.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:39:47,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.33 ms. Allocated memory is still 119.5 MB. Free memory was 88.9 MB in the beginning and 97.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.62 ms. Allocated memory is still 119.5 MB. Free memory was 97.8 MB in the beginning and 96.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.32 ms. Allocated memory is still 119.5 MB. Free memory was 96.4 MB in the beginning and 95.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 378.03 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 83.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9590.61 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 83.9 MB in the beginning and 136.0 MB in the end (delta: -52.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Witness Printer took 92.99 ms. Allocated memory is still 174.1 MB. Free memory was 134.9 MB in the beginning and 131.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 10 [L4] __assert_fail("0", "id_o10.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 213 SDtfs, 3 SDslu, 2435 SDs, 0 SdLazy, 1220 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 463 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 800 NumberOfCodeBlocks, 800 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 711 ConstructedInterpolants, 0 QuantifiedInterpolants, 126315 SizeOfPredicates, 9 NumberOfNonLiveVariables, 999 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...