./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.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_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 93ddc895418216afe230ea40e87acd63de5c2d0d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:46:54,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:46:54,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:46:54,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:46:54,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:46:54,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:46:54,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:46:54,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:46:54,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:46:54,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:46:54,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:46:54,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:46:54,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:46:54,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:46:54,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:46:54,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:46:54,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:46:54,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:46:54,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:46:54,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:46:54,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:46:54,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:46:54,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:46:54,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:46:54,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:46:54,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:46:54,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:46:55,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:46:55,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:46:55,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:46:55,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:46:55,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:46:55,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:46:55,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:46:55,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:46:55,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:46:55,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:46:55,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:46:55,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:46:55,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:46:55,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:46:55,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:46:55,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:46:55,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:46:55,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:46:55,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:46:55,038 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:46:55,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:46:55,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:46:55,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:46:55,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:46:55,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:46:55,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:46:55,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:46:55,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:46:55,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:46:55,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:46:55,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:46:55,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:46:55,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:46:55,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:46:55,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:46:55,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:46:55,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:46:55,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:46:55,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:46:55,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:46:55,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:46:55,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:46:55,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:46:55,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:46:55,043 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_8e6d47d9-134a-48ce-8af6-de929089beb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ddc895418216afe230ea40e87acd63de5c2d0d [2020-11-30 00:46:55,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:46:55,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:46:55,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:46:55,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:46:55,354 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:46:55,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/../../sv-benchmarks/c/loop-simple/nested_2.c [2020-11-30 00:46:55,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/data/d7af836aa/735078962b414fbc845afbe59406e6d3/FLAG75af7dc60 [2020-11-30 00:46:55,914 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:46:55,915 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/sv-benchmarks/c/loop-simple/nested_2.c [2020-11-30 00:46:55,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/data/d7af836aa/735078962b414fbc845afbe59406e6d3/FLAG75af7dc60 [2020-11-30 00:46:56,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/data/d7af836aa/735078962b414fbc845afbe59406e6d3 [2020-11-30 00:46:56,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:46:56,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:46:56,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:46:56,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:46:56,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:46:56,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5568e0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56, skipping insertion in model container [2020-11-30 00:46:56,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:46:56,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:46:56,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:46:56,534 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:46:56,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:46:56,567 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:46:56,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56 WrapperNode [2020-11-30 00:46:56,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:46:56,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:46:56,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:46:56,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:46:56,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:46:56,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:46:56,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:46:56,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:46:56,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... [2020-11-30 00:46:56,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:46:56,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:46:56,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:46:56,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:46:56,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:56,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:46:56,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:46:56,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:46:56,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:46:57,079 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:46:57,079 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 00:46:57,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:46:57 BoogieIcfgContainer [2020-11-30 00:46:57,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:46:57,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:46:57,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:46:57,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:46:57,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:46:56" (1/3) ... [2020-11-30 00:46:57,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf59ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:46:57, skipping insertion in model container [2020-11-30 00:46:57,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:46:56" (2/3) ... [2020-11-30 00:46:57,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf59ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:46:57, skipping insertion in model container [2020-11-30 00:46:57,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:46:57" (3/3) ... [2020-11-30 00:46:57,091 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2020-11-30 00:46:57,105 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:46:57,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:46:57,120 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:46:57,157 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:46:57,157 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:46:57,157 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:46:57,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:46:57,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:46:57,158 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:46:57,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:46:57,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:46:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-30 00:46:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 00:46:57,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:57,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 00:46:57,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:57,188 INFO L82 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2020-11-30 00:46:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:57,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274385110] [2020-11-30 00:46:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:46:57,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274385110] [2020-11-30 00:46:57,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:46:57,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:46:57,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297483707] [2020-11-30 00:46:57,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:46:57,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:46:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:46:57,400 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-11-30 00:46:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:57,474 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-11-30 00:46:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:46:57,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 00:46:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:57,483 INFO L225 Difference]: With dead ends: 28 [2020-11-30 00:46:57,483 INFO L226 Difference]: Without dead ends: 13 [2020-11-30 00:46:57,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:46:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-30 00:46:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2020-11-30 00:46:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 00:46:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-30 00:46:57,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2020-11-30 00:46:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:57,517 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-30 00:46:57,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:46:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-30 00:46:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:46:57,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:57,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:46:57,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:46:57,519 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2020-11-30 00:46:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:57,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597291102] [2020-11-30 00:46:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:46:57,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597291102] [2020-11-30 00:46:57,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:46:57,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:46:57,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903539981] [2020-11-30 00:46:57,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:46:57,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:46:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:46:57,567 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-30 00:46:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:57,592 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 00:46:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:46:57,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 00:46:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:57,594 INFO L225 Difference]: With dead ends: 19 [2020-11-30 00:46:57,594 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 00:46:57,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:46:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 00:46:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-11-30 00:46:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 00:46:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-30 00:46:57,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-11-30 00:46:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:57,599 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-30 00:46:57,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:46:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-30 00:46:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:46:57,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:57,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:46:57,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:46:57,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2020-11-30 00:46:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:57,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986459428] [2020-11-30 00:46:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:46:57,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986459428] [2020-11-30 00:46:57,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716835150] [2020-11-30 00:46:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:57,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 00:46:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:46:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:46:57,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:46:57,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-30 00:46:57,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039539517] [2020-11-30 00:46:57,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:46:57,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:46:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:46:57,806 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-30 00:46:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:57,840 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 00:46:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:46:57,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:46:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:57,842 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:46:57,842 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 00:46:57,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:46:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 00:46:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-30 00:46:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 00:46:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-30 00:46:57,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-30 00:46:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:57,846 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-30 00:46:57,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:46:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-30 00:46:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:46:57,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:57,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:46:58,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 00:46:58,059 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash 147832950, now seen corresponding path program 2 times [2020-11-30 00:46:58,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:58,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571118042] [2020-11-30 00:46:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:46:58,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571118042] [2020-11-30 00:46:58,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783671627] [2020-11-30 00:46:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:58,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:46:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:46:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:46:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:46:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:46:58,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:46:58,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-30 00:46:58,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127070679] [2020-11-30 00:46:58,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:46:58,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:46:58,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:46:58,257 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-11-30 00:46:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:58,420 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-11-30 00:46:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 00:46:58,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-30 00:46:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:58,423 INFO L225 Difference]: With dead ends: 45 [2020-11-30 00:46:58,423 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 00:46:58,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:46:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 00:46:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-11-30 00:46:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:46:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 00:46:58,429 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2020-11-30 00:46:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:58,430 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 00:46:58,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:46:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 00:46:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:46:58,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:58,431 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 00:46:58,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:46:58,632 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1657769242, now seen corresponding path program 3 times [2020-11-30 00:46:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246937931] [2020-11-30 00:46:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 00:46:58,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246937931] [2020-11-30 00:46:58,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916157479] [2020-11-30 00:46:58,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:58,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-30 00:46:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:46:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:46:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:46:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:46:58,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:46:58,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-30 00:46:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499018869] [2020-11-30 00:46:58,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:46:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:46:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:46:58,789 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-11-30 00:46:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:58,841 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-30 00:46:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:46:58,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-11-30 00:46:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:58,843 INFO L225 Difference]: With dead ends: 44 [2020-11-30 00:46:58,843 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 00:46:58,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:46:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 00:46:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-30 00:46:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 00:46:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-30 00:46:58,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-11-30 00:46:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:58,850 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-30 00:46:58,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:46:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-30 00:46:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:46:58,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:58,851 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 00:46:59,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:46:59,072 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash 953965478, now seen corresponding path program 4 times [2020-11-30 00:46:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:59,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839930327] [2020-11-30 00:46:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 00:46:59,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839930327] [2020-11-30 00:46:59,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751402758] [2020-11-30 00:46:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:59,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:46:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:46:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:46:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:46:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-30 00:46:59,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:46:59,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 00:46:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576035974] [2020-11-30 00:46:59,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:46:59,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:46:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:46:59,249 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-11-30 00:46:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:59,465 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-11-30 00:46:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:46:59,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-30 00:46:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:59,469 INFO L225 Difference]: With dead ends: 50 [2020-11-30 00:46:59,469 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 00:46:59,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:46:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 00:46:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-30 00:46:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 00:46:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-30 00:46:59,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-11-30 00:46:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:59,476 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-30 00:46:59,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:46:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-30 00:46:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 00:46:59,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:59,478 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 00:46:59,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:46:59,700 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:46:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:46:59,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1188152166, now seen corresponding path program 5 times [2020-11-30 00:46:59,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:46:59,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951487908] [2020-11-30 00:46:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:46:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:46:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 00:46:59,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951487908] [2020-11-30 00:46:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134239102] [2020-11-30 00:46:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:46:59,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-30 00:46:59,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:46:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 00:46:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:46:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-30 00:46:59,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:46:59,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 00:46:59,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758502536] [2020-11-30 00:46:59,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:46:59,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:46:59,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:46:59,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:46:59,924 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-11-30 00:46:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:46:59,984 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-11-30 00:46:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:46:59,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-11-30 00:46:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:46:59,985 INFO L225 Difference]: With dead ends: 54 [2020-11-30 00:46:59,985 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 00:46:59,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:46:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 00:46:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 00:46:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 00:46:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-30 00:46:59,992 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-11-30 00:46:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:46:59,992 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-30 00:46:59,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:46:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-30 00:46:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-30 00:46:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:46:59,994 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 00:47:00,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 00:47:00,194 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:47:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:47:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 6 times [2020-11-30 00:47:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:47:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175468771] [2020-11-30 00:47:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:47:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:47:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-30 00:47:00,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175468771] [2020-11-30 00:47:00,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248262741] [2020-11-30 00:47:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:47:00,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-30 00:47:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:47:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:47:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:47:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-30 00:47:00,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:47:00,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-30 00:47:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798917942] [2020-11-30 00:47:00,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:47:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:47:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:47:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:47:00,387 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-11-30 00:47:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:47:00,415 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-11-30 00:47:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:47:00,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-11-30 00:47:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:47:00,417 INFO L225 Difference]: With dead ends: 68 [2020-11-30 00:47:00,417 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 00:47:00,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:47:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 00:47:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-11-30 00:47:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 00:47:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-11-30 00:47:00,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 35 [2020-11-30 00:47:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:47:00,427 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-11-30 00:47:00,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:47:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-11-30 00:47:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-30 00:47:00,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:47:00,429 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-30 00:47:00,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:47:00,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:47:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:47:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1549796206, now seen corresponding path program 7 times [2020-11-30 00:47:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:47:00,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137110955] [2020-11-30 00:47:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:47:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:47:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-30 00:47:00,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137110955] [2020-11-30 00:47:00,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200778449] [2020-11-30 00:47:00,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:47:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:47:00,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:47:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:47:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-30 00:47:00,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:47:00,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-30 00:47:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253049628] [2020-11-30 00:47:00,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:47:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:47:00,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:47:00,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:47:00,844 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 7 states. [2020-11-30 00:47:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:47:00,892 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-11-30 00:47:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:47:00,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-11-30 00:47:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:47:00,894 INFO L225 Difference]: With dead ends: 83 [2020-11-30 00:47:00,894 INFO L226 Difference]: Without dead ends: 80 [2020-11-30 00:47:00,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:47:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-30 00:47:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-11-30 00:47:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-30 00:47:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-11-30 00:47:00,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2020-11-30 00:47:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:47:00,912 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-11-30 00:47:00,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:47:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-11-30 00:47:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-30 00:47:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:47:00,915 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-30 00:47:01,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:47:01,115 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:47:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:47:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1394520358, now seen corresponding path program 8 times [2020-11-30 00:47:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:47:01,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040764923] [2020-11-30 00:47:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:47:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:47:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 00:47:01,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040764923] [2020-11-30 00:47:01,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489978933] [2020-11-30 00:47:01,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:47:01,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:47:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:47:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:47:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:47:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 00:47:01,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:47:01,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 00:47:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340688636] [2020-11-30 00:47:01,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:47:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:47:01,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:47:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:47:01,362 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2020-11-30 00:47:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:47:01,407 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-11-30 00:47:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:47:01,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-11-30 00:47:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:47:01,409 INFO L225 Difference]: With dead ends: 98 [2020-11-30 00:47:01,409 INFO L226 Difference]: Without dead ends: 95 [2020-11-30 00:47:01,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:47:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-30 00:47:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2020-11-30 00:47:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 00:47:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-11-30 00:47:01,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 65 [2020-11-30 00:47:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:47:01,430 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-11-30 00:47:01,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:47:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-11-30 00:47:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-30 00:47:01,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:47:01,432 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2020-11-30 00:47:01,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 00:47:01,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:47:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:47:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash -60302226, now seen corresponding path program 9 times [2020-11-30 00:47:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:47:01,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554041900] [2020-11-30 00:47:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:47:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:47:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-30 00:47:01,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554041900] [2020-11-30 00:47:01,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753336540] [2020-11-30 00:47:01,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/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 [2020-11-30 00:47:01,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-30 00:47:01,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:47:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 00:47:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:47:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2020-11-30 00:47:02,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:47:02,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2020-11-30 00:47:02,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696751468] [2020-11-30 00:47:02,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:47:02,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:47:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:47:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:47:02,081 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 8 states. [2020-11-30 00:47:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:47:02,125 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-11-30 00:47:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:47:02,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-11-30 00:47:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:47:02,128 INFO L225 Difference]: With dead ends: 81 [2020-11-30 00:47:02,128 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:47:02,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:47:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:47:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:47:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:47:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:47:02,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-11-30 00:47:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:47:02,130 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:47:02,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:47:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:47:02,131 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:47:02,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:47:02,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 00:47:02,487 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:47:02,487 INFO L274 CegarLoopResult]: For program point L25(lines 25 27) no Hoare annotation was computed. [2020-11-30 00:47:02,487 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (< ULTIMATE.start_main_~b~0 7) (<= ULTIMATE.start_main_~a~0 5)) [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L277 CegarLoopResult]: At program point L28(lines 15 29) the Hoare annotation is: true [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-11-30 00:47:02,488 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2020-11-30 00:47:02,489 INFO L270 CegarLoopResult]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0)) [2020-11-30 00:47:02,489 INFO L274 CegarLoopResult]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2020-11-30 00:47:02,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:47:02 BoogieIcfgContainer [2020-11-30 00:47:02,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:47:02,503 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:47:02,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:47:02,503 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:47:02,504 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:46:57" (3/4) ... [2020-11-30 00:47:02,507 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:47:02,515 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 00:47:02,515 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:47:02,515 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:47:02,516 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:47:02,564 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8e6d47d9-134a-48ce-8af6-de929089beb1/bin/uautomizer/witness.graphml [2020-11-30 00:47:02,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:47:02,566 INFO L168 Benchmark]: Toolchain (without parser) took 6265.73 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 61.5 MB in the beginning and 69.3 MB in the end (delta: -7.8 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:47:02,567 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:47:02,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.93 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 68.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:47:02,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 90.2 MB. Free memory was 68.6 MB in the beginning and 67.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:47:02,568 INFO L168 Benchmark]: Boogie Preprocessor took 37.61 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 66.5 MB in the end (delta: 802.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:47:02,568 INFO L168 Benchmark]: RCFGBuilder took 435.59 ms. Allocated memory is still 90.2 MB. Free memory was 66.1 MB in the beginning and 55.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:47:02,570 INFO L168 Benchmark]: TraceAbstraction took 5420.43 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 55.3 MB in the beginning and 71.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:47:02,571 INFO L168 Benchmark]: Witness Printer took 60.96 ms. Allocated memory is still 134.2 MB. Free memory was 71.4 MB in the beginning and 69.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:47:02,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory was 47.2 MB in the beginning and 47.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.93 ms. Allocated memory is still 90.2 MB. Free memory was 61.2 MB in the beginning and 68.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.79 ms. Allocated memory is still 90.2 MB. Free memory was 68.6 MB in the beginning and 67.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.61 ms. Allocated memory is still 90.2 MB. Free memory was 67.3 MB in the beginning and 66.5 MB in the end (delta: 802.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 435.59 ms. Allocated memory is still 90.2 MB. Free memory was 66.1 MB in the beginning and 55.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5420.43 ms. Allocated memory was 90.2 MB in the beginning and 134.2 MB in the end (delta: 44.0 MB). Free memory was 55.3 MB in the beginning and 71.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. * Witness Printer took 60.96 ms. Allocated memory is still 134.2 MB. Free memory was 71.4 MB in the beginning and 69.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (a <= 6 && b < 7) && 6 <= b - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: b < 7 && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 11, TraceHistogramMax: 30, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 159 SDs, 0 SdLazy, 218 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred 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, 11 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1545 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 679 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 81577 SizeOfPredicates, 10 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2269/5009 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 correct! Received shutdown request...