./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-1.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_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/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 a0175e46c372a5de5baa3319396a86b21fa2d79f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:13:37,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:13:37,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:13:38,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:13:38,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:13:38,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:13:38,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:13:38,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:13:38,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:13:38,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:13:38,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:13:38,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:13:38,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:13:38,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:13:38,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:13:38,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:13:38,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:13:38,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:13:38,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:13:38,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:13:38,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:13:38,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:13:38,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:13:38,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:13:38,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:13:38,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:13:38,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:13:38,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:13:38,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:13:38,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:13:38,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:13:38,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:13:38,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:13:38,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:13:38,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:13:38,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:13:38,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:13:38,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:13:38,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:13:38,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:13:38,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:13:38,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:13:38,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:13:38,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:13:38,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:13:38,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:13:38,141 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:13:38,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:13:38,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:13:38,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:13:38,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:13:38,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:13:38,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:13:38,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:13:38,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:13:38,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:13:38,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:13:38,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:13:38,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:13:38,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:13:38,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:13:38,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:13:38,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:13:38,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:13:38,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:13:38,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:13:38,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:13:38,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:13:38,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:13:38,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:13:38,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:13:38,146 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_fee164ab-3752-41cc-873e-82beb474ddb8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0175e46c372a5de5baa3319396a86b21fa2d79f [2020-11-29 18:13:38,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:13:38,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:13:38,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:13:38,432 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:13:38,434 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:13:38,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/../../sv-benchmarks/c/loops/eureka_01-1.c [2020-11-29 18:13:38,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/data/3327c8b2e/acb8f94a20a0499d930134330a639216/FLAG3fa995737 [2020-11-29 18:13:39,020 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:13:39,021 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/sv-benchmarks/c/loops/eureka_01-1.c [2020-11-29 18:13:39,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/data/3327c8b2e/acb8f94a20a0499d930134330a639216/FLAG3fa995737 [2020-11-29 18:13:39,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/data/3327c8b2e/acb8f94a20a0499d930134330a639216 [2020-11-29 18:13:39,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:13:39,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:13:39,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:13:39,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:13:39,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:13:39,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a4b294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39, skipping insertion in model container [2020-11-29 18:13:39,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:13:39,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:13:39,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:13:39,783 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:13:39,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:13:39,873 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:13:39,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39 WrapperNode [2020-11-29 18:13:39,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:13:39,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:13:39,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:13:39,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:13:39,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:13:39,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:13:39,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:13:39,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:13:39,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... [2020-11-29 18:13:39,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:13:39,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:13:39,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:13:39,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:13:39,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:13:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:13:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:13:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:13:40,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:13:40,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:13:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:13:40,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:13:40,517 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:13:40,519 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 18:13:40,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:40 BoogieIcfgContainer [2020-11-29 18:13:40,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:13:40,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:13:40,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:13:40,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:13:40,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:13:39" (1/3) ... [2020-11-29 18:13:40,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1f4958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:13:40, skipping insertion in model container [2020-11-29 18:13:40,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:13:39" (2/3) ... [2020-11-29 18:13:40,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1f4958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:13:40, skipping insertion in model container [2020-11-29 18:13:40,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:40" (3/3) ... [2020-11-29 18:13:40,531 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-11-29 18:13:40,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:13:40,547 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:13:40,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:13:40,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:13:40,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:13:40,590 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:13:40,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:13:40,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:13:40,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:13:40,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:13:40,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:13:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-29 18:13:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 18:13:40,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:40,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:40,609 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2020-11-29 18:13:40,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:40,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247279505] [2020-11-29 18:13:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:13:40,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247279505] [2020-11-29 18:13:40,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:13:40,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:13:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422841697] [2020-11-29 18:13:40,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:13:40,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:13:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:13:40,918 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-11-29 18:13:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:41,146 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2020-11-29 18:13:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:13:41,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 18:13:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:41,163 INFO L225 Difference]: With dead ends: 90 [2020-11-29 18:13:41,172 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 18:13:41,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:13:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 18:13:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2020-11-29 18:13:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 18:13:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 18:13:41,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2020-11-29 18:13:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:41,215 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 18:13:41,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:13:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 18:13:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 18:13:41,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:41,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:41,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:13:41,217 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2020-11-29 18:13:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:41,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596857818] [2020-11-29 18:13:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596857818] [2020-11-29 18:13:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041294198] [2020-11-29 18:13:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:13:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:41,666 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-29 18:13:41,667 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:41,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:41,672 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:41,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-29 18:13:41,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:41,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:41,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:41,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-29 18:13:41,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83500459] [2020-11-29 18:13:41,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:13:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:13:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:13:41,837 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2020-11-29 18:13:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:42,090 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-11-29 18:13:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:13:42,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-29 18:13:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:42,093 INFO L225 Difference]: With dead ends: 83 [2020-11-29 18:13:42,093 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 18:13:42,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:13:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 18:13:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-11-29 18:13:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 18:13:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-11-29 18:13:42,114 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2020-11-29 18:13:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:42,115 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-11-29 18:13:42,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:13:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-11-29 18:13:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 18:13:42,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:42,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:42,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 18:13:42,335 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2020-11-29 18:13:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797343014] [2020-11-29 18:13:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:42,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797343014] [2020-11-29 18:13:42,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:13:42,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:13:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338893468] [2020-11-29 18:13:42,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:13:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:13:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:13:42,418 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 3 states. [2020-11-29 18:13:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:42,464 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-11-29 18:13:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:13:42,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 18:13:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:42,465 INFO L225 Difference]: With dead ends: 66 [2020-11-29 18:13:42,465 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 18:13:42,466 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 [2020-11-29 18:13:42,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 18:13:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-11-29 18:13:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 18:13:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-11-29 18:13:42,473 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2020-11-29 18:13:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:42,473 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-11-29 18:13:42,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:13:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-11-29 18:13:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:13:42,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:42,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:42,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 18:13:42,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2020-11-29 18:13:42,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:42,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41677578] [2020-11-29 18:13:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:42,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41677578] [2020-11-29 18:13:42,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580295433] [2020-11-29 18:13:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:13:42,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:42,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:42,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-29 18:13:42,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908530589] [2020-11-29 18:13:42,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:13:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:13:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:13:42,708 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 7 states. [2020-11-29 18:13:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:42,865 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-11-29 18:13:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:13:42,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-29 18:13:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:42,867 INFO L225 Difference]: With dead ends: 114 [2020-11-29 18:13:42,867 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 18:13:42,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:13:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 18:13:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-11-29 18:13:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 18:13:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-11-29 18:13:42,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2020-11-29 18:13:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:42,887 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-11-29 18:13:42,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:13:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-11-29 18:13:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 18:13:42,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:42,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:43,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:43,116 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:43,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2020-11-29 18:13:43,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:43,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225675649] [2020-11-29 18:13:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:13:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225675649] [2020-11-29 18:13:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878210378] [2020-11-29 18:13:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:13:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:13:43,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:43,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-29 18:13:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922295002] [2020-11-29 18:13:43,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:13:43,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:43,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:13:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:13:43,354 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 10 states. [2020-11-29 18:13:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:43,602 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2020-11-29 18:13:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:13:43,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-29 18:13:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:43,604 INFO L225 Difference]: With dead ends: 181 [2020-11-29 18:13:43,604 INFO L226 Difference]: Without dead ends: 159 [2020-11-29 18:13:43,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:13:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-29 18:13:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-11-29 18:13:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 18:13:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2020-11-29 18:13:43,631 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2020-11-29 18:13:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:43,636 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2020-11-29 18:13:43,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:13:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2020-11-29 18:13:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 18:13:43,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:43,637 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:43,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:43,838 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:43,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1293432562, now seen corresponding path program 1 times [2020-11-29 18:13:43,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:43,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963475123] [2020-11-29 18:13:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963475123] [2020-11-29 18:13:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938494806] [2020-11-29 18:13:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:13:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:44,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:44,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-29 18:13:44,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751268765] [2020-11-29 18:13:44,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:13:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:13:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:13:44,068 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 10 states. [2020-11-29 18:13:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:44,227 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-11-29 18:13:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:13:44,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-29 18:13:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:44,228 INFO L225 Difference]: With dead ends: 206 [2020-11-29 18:13:44,229 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 18:13:44,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:13:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 18:13:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2020-11-29 18:13:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 18:13:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-11-29 18:13:44,244 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2020-11-29 18:13:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:44,244 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-11-29 18:13:44,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:13:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-11-29 18:13:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 18:13:44,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:44,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:44,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:44,472 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2020-11-29 18:13:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:44,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914249602] [2020-11-29 18:13:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914249602] [2020-11-29 18:13:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610452951] [2020-11-29 18:13:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:13:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:45,072 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:45,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2020-11-29 18:13:45,075 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:45,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:45,092 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:45,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:18 [2020-11-29 18:13:45,126 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 18:13:45,127 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:45,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:45,135 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:45,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-11-29 18:13:45,248 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:45,249 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 59 [2020-11-29 18:13:45,250 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:45,286 INFO L625 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2020-11-29 18:13:45,289 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 18:13:45,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-11-29 18:13:45,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:45,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:45,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:45,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-11-29 18:13:45,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108333753] [2020-11-29 18:13:45,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 18:13:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 18:13:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-11-29 18:13:45,506 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 16 states. [2020-11-29 18:13:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:47,743 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2020-11-29 18:13:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 18:13:47,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-11-29 18:13:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:47,746 INFO L225 Difference]: With dead ends: 252 [2020-11-29 18:13:47,746 INFO L226 Difference]: Without dead ends: 230 [2020-11-29 18:13:47,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 18:13:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-11-29 18:13:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2020-11-29 18:13:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 18:13:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-11-29 18:13:47,793 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2020-11-29 18:13:47,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:47,794 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-11-29 18:13:47,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 18:13:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-11-29 18:13:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 18:13:47,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:47,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:47,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 18:13:47,996 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2020-11-29 18:13:47,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:47,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615204019] [2020-11-29 18:13:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:13:48,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615204019] [2020-11-29 18:13:48,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895983760] [2020-11-29 18:13:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:48,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:13:48,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:13:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:13:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:48,253 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-29 18:13:48,254 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:48,259 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:48,259 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:48,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-11-29 18:13:48,303 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:48,303 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 46 [2020-11-29 18:13:48,304 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:48,321 INFO L625 ElimStorePlain]: treesize reduction 24, result has 47.8 percent of original size [2020-11-29 18:13:48,323 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:48,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:7 [2020-11-29 18:13:48,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:48,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:13:48,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:48,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-29 18:13:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105484416] [2020-11-29 18:13:48,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:13:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:13:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:13:48,371 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 13 states. [2020-11-29 18:13:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:48,751 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-11-29 18:13:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:13:48,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-11-29 18:13:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:48,753 INFO L225 Difference]: With dead ends: 170 [2020-11-29 18:13:48,753 INFO L226 Difference]: Without dead ends: 168 [2020-11-29 18:13:48,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:13:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-29 18:13:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2020-11-29 18:13:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 18:13:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-11-29 18:13:48,769 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2020-11-29 18:13:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:48,769 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-11-29 18:13:48,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:13:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-11-29 18:13:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 18:13:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:48,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:48,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:48,984 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2020-11-29 18:13:48,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:48,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360773894] [2020-11-29 18:13:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:49,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360773894] [2020-11-29 18:13:49,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085992997] [2020-11-29 18:13:49,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:49,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:13:49,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:13:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:13:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:13:49,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:49,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-11-29 18:13:49,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105484814] [2020-11-29 18:13:49,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 18:13:49,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:13:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:13:49,242 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 10 states. [2020-11-29 18:13:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:49,498 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-11-29 18:13:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:13:49,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-11-29 18:13:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:49,500 INFO L225 Difference]: With dead ends: 216 [2020-11-29 18:13:49,501 INFO L226 Difference]: Without dead ends: 203 [2020-11-29 18:13:49,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:13:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-29 18:13:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2020-11-29 18:13:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 18:13:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-11-29 18:13:49,536 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2020-11-29 18:13:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:49,536 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-11-29 18:13:49,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 18:13:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-11-29 18:13:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 18:13:49,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:49,538 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:49,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:49,744 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 219879636, now seen corresponding path program 2 times [2020-11-29 18:13:49,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:49,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901865561] [2020-11-29 18:13:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 18:13:49,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901865561] [2020-11-29 18:13:49,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336025525] [2020-11-29 18:13:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:49,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:13:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:13:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:13:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 18:13:49,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:13:49,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-11-29 18:13:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572699190] [2020-11-29 18:13:49,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:13:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:13:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:13:49,910 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 4 states. [2020-11-29 18:13:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:49,981 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2020-11-29 18:13:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:13:49,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-29 18:13:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:49,983 INFO L225 Difference]: With dead ends: 246 [2020-11-29 18:13:49,983 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 18:13:49,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:13:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 18:13:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2020-11-29 18:13:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-29 18:13:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2020-11-29 18:13:50,006 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2020-11-29 18:13:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:50,008 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2020-11-29 18:13:50,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:13:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2020-11-29 18:13:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 18:13:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:50,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:50,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 18:13:50,232 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 642581462, now seen corresponding path program 1 times [2020-11-29 18:13:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:50,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046071856] [2020-11-29 18:13:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:13:50,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046071856] [2020-11-29 18:13:50,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575044961] [2020-11-29 18:13:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:13:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:50,557 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 18:13:50,557 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:50,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:50,565 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:50,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-11-29 18:13:50,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:50,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:13:50,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-11-29 18:13:50,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851065530] [2020-11-29 18:13:50,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 18:13:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:13:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:13:50,640 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand 15 states. [2020-11-29 18:13:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:13:51,102 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-11-29 18:13:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 18:13:51,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-11-29 18:13:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:13:51,104 INFO L225 Difference]: With dead ends: 183 [2020-11-29 18:13:51,104 INFO L226 Difference]: Without dead ends: 181 [2020-11-29 18:13:51,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-11-29 18:13:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-29 18:13:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-11-29 18:13:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-29 18:13:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-11-29 18:13:51,120 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2020-11-29 18:13:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:13:51,120 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-11-29 18:13:51,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 18:13:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-11-29 18:13:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 18:13:51,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:13:51,122 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:13:51,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:51,344 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:13:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:13:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2020-11-29 18:13:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:13:51,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909991644] [2020-11-29 18:13:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:13:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:13:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:13:51,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909991644] [2020-11-29 18:13:51,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888502660] [2020-11-29 18:13:51,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:13:52,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:13:52,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:13:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 18:13:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:13:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,194 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:52,194 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2020-11-29 18:13:52,196 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:52,217 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:52,224 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:52,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:53 [2020-11-29 18:13:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,287 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:52,288 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 60 [2020-11-29 18:13:52,289 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:52,343 INFO L625 ElimStorePlain]: treesize reduction 20, result has 72.6 percent of original size [2020-11-29 18:13:52,343 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:13:52,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:53 [2020-11-29 18:13:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 18:13:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:52,654 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-11-29 18:13:52,655 INFO L350 Elim1Store]: treesize reduction 16, result has 93.7 percent of original size [2020-11-29 18:13:52,655 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 66 treesize of output 275 [2020-11-29 18:13:52,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:52,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:52,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:52,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:52,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:52,666 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:52,740 INFO L625 ElimStorePlain]: treesize reduction 207, result has 26.3 percent of original size [2020-11-29 18:13:52,741 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 18:13:52,742 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:74 [2020-11-29 18:13:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:13:53,086 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-11-29 18:13:53,091 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:13:53,091 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 80 treesize of output 429 [2020-11-29 18:13:53,096 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-11-29 18:13:53,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,098 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,100 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,107 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,111 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 18:13:53,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,113 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,117 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,118 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,119 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 18:13:53,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:53,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,151 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 18:13:53,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-29 18:13:53,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-29 18:13:53,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,158 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,161 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,165 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,166 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-29 18:13:53,174 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-11-29 18:13:53,178 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,182 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,187 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,195 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,205 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-11-29 18:13:53,211 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-11-29 18:13:53,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,216 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,225 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-29 18:13:53,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,229 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,235 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-11-29 18:13:53,236 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-11-29 18:13:53,242 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:13:53,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 18:13:53,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:53,248 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-29 18:13:53,256 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:13:53,695 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 49 [2020-11-29 18:13:53,696 INFO L625 ElimStorePlain]: treesize reduction 2482, result has 3.7 percent of original size [2020-11-29 18:13:53,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,699 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 18:13:53,699 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:93, output treesize:95 [2020-11-29 18:13:53,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:13:53,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:54,433 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-29 18:13:54,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:54,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:54,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:54,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:13:54,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:13:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:13:54,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:13:54,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2020-11-29 18:13:54,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601873646] [2020-11-29 18:13:54,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 18:13:54,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:13:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 18:13:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2020-11-29 18:13:54,984 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 28 states. [2020-11-29 18:13:55,979 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-11-29 18:13:56,633 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 67 [2020-11-29 18:13:57,130 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-11-29 18:13:57,628 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2020-11-29 18:14:01,938 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2020-11-29 18:14:02,619 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2020-11-29 18:14:04,941 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-11-29 18:14:06,485 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 101 [2020-11-29 18:14:06,768 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-29 18:14:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:06,769 INFO L93 Difference]: Finished difference Result 186 states and 228 transitions. [2020-11-29 18:14:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 18:14:06,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-29 18:14:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:06,770 INFO L225 Difference]: With dead ends: 186 [2020-11-29 18:14:06,770 INFO L226 Difference]: Without dead ends: 141 [2020-11-29 18:14:06,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=462, Invalid=2088, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 18:14:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-29 18:14:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-11-29 18:14:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-29 18:14:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2020-11-29 18:14:06,786 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2020-11-29 18:14:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:06,786 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2020-11-29 18:14:06,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 18:14:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2020-11-29 18:14:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 18:14:06,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:06,787 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:07,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:07,002 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2020-11-29 18:14:07,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:07,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728624243] [2020-11-29 18:14:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 18:14:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728624243] [2020-11-29 18:14:07,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:14:07,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:14:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824920611] [2020-11-29 18:14:07,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:14:07,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:07,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:14:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:14:07,064 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand 5 states. [2020-11-29 18:14:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:07,106 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2020-11-29 18:14:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:14:07,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-29 18:14:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:07,109 INFO L225 Difference]: With dead ends: 197 [2020-11-29 18:14:07,109 INFO L226 Difference]: Without dead ends: 141 [2020-11-29 18:14:07,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:14:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-29 18:14:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-11-29 18:14:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-29 18:14:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2020-11-29 18:14:07,127 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2020-11-29 18:14:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:07,127 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2020-11-29 18:14:07,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:14:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2020-11-29 18:14:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 18:14:07,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:07,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:07,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 18:14:07,129 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:07,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2054058346, now seen corresponding path program 2 times [2020-11-29 18:14:07,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:07,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668886709] [2020-11-29 18:14:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:14:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668886709] [2020-11-29 18:14:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598755227] [2020-11-29 18:14:07,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:07,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:14:07,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:14:07,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:14:07,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:07,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-11-29 18:14:07,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053223195] [2020-11-29 18:14:07,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:14:07,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:14:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:14:07,353 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand 13 states. [2020-11-29 18:14:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:07,656 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2020-11-29 18:14:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:14:07,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-11-29 18:14:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:07,659 INFO L225 Difference]: With dead ends: 403 [2020-11-29 18:14:07,659 INFO L226 Difference]: Without dead ends: 298 [2020-11-29 18:14:07,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:14:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-29 18:14:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2020-11-29 18:14:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-29 18:14:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-11-29 18:14:07,686 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2020-11-29 18:14:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:07,686 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-11-29 18:14:07,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:14:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-11-29 18:14:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 18:14:07,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:07,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:07,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 18:14:07,900 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2020-11-29 18:14:07,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:07,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748472155] [2020-11-29 18:14:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:14:07,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748472155] [2020-11-29 18:14:07,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58982123] [2020-11-29 18:14:07,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:08,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:14:08,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:14:08,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:14:08,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:08,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-11-29 18:14:08,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249824788] [2020-11-29 18:14:08,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:14:08,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:08,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:14:08,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:14:08,105 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 13 states. [2020-11-29 18:14:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:08,452 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2020-11-29 18:14:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:14:08,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-11-29 18:14:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:08,455 INFO L225 Difference]: With dead ends: 487 [2020-11-29 18:14:08,455 INFO L226 Difference]: Without dead ends: 465 [2020-11-29 18:14:08,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:14:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-11-29 18:14:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2020-11-29 18:14:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-11-29 18:14:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2020-11-29 18:14:08,490 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2020-11-29 18:14:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:08,491 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2020-11-29 18:14:08,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:14:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2020-11-29 18:14:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 18:14:08,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:08,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:08,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 18:14:08,701 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2020-11-29 18:14:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:08,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157316258] [2020-11-29 18:14:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 18:14:09,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157316258] [2020-11-29 18:14:09,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260373117] [2020-11-29 18:14:09,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:09,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:14:09,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 18:14:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:09,345 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:09,345 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2020-11-29 18:14:09,346 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:09,361 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:09,363 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:09,363 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:40 [2020-11-29 18:14:09,440 INFO L350 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2020-11-29 18:14:09,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 74 [2020-11-29 18:14:09,442 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:09,481 INFO L625 ElimStorePlain]: treesize reduction 42, result has 54.8 percent of original size [2020-11-29 18:14:09,482 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:09,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:51 [2020-11-29 18:14:09,627 INFO L350 Elim1Store]: treesize reduction 12, result has 83.3 percent of original size [2020-11-29 18:14:09,628 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 108 [2020-11-29 18:14:09,629 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:09,683 INFO L625 ElimStorePlain]: treesize reduction 72, result has 44.6 percent of original size [2020-11-29 18:14:09,685 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:09,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:44 [2020-11-29 18:14:09,899 INFO L350 Elim1Store]: treesize reduction 12, result has 83.3 percent of original size [2020-11-29 18:14:09,899 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 111 [2020-11-29 18:14:09,900 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:09,954 INFO L625 ElimStorePlain]: treesize reduction 72, result has 46.3 percent of original size [2020-11-29 18:14:09,956 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:09,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:62 [2020-11-29 18:14:10,254 INFO L350 Elim1Store]: treesize reduction 12, result has 90.8 percent of original size [2020-11-29 18:14:10,255 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 178 [2020-11-29 18:14:10,256 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:10,371 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-11-29 18:14:10,371 INFO L625 ElimStorePlain]: treesize reduction 110, result has 41.2 percent of original size [2020-11-29 18:14:10,374 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:10,374 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:77 [2020-11-29 18:14:10,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:10,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:10,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:14:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:14:10,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:10,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2020-11-29 18:14:10,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790141468] [2020-11-29 18:14:10,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 18:14:10,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 18:14:10,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:14:10,742 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand 24 states. [2020-11-29 18:14:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:13,807 INFO L93 Difference]: Finished difference Result 559 states and 708 transitions. [2020-11-29 18:14:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 18:14:13,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-11-29 18:14:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:13,810 INFO L225 Difference]: With dead ends: 559 [2020-11-29 18:14:13,810 INFO L226 Difference]: Without dead ends: 557 [2020-11-29 18:14:13,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=629, Invalid=2677, Unknown=0, NotChecked=0, Total=3306 [2020-11-29 18:14:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-11-29 18:14:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 387. [2020-11-29 18:14:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-11-29 18:14:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 513 transitions. [2020-11-29 18:14:13,886 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 513 transitions. Word has length 34 [2020-11-29 18:14:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:13,887 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 513 transitions. [2020-11-29 18:14:13,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 18:14:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 513 transitions. [2020-11-29 18:14:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 18:14:13,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:13,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:14,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 18:14:14,100 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2020-11-29 18:14:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:14,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436069024] [2020-11-29 18:14:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:14,585 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-11-29 18:14:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 18:14:15,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436069024] [2020-11-29 18:14:15,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115074847] [2020-11-29 18:14:15,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:15,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 18:14:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:14:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-29 18:14:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:15,390 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:15,391 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2020-11-29 18:14:15,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:15,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:15,413 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:15,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:15,444 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:15,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:100, output treesize:95 [2020-11-29 18:14:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,533 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:15,533 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 88 [2020-11-29 18:14:15,534 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:15,587 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:15,587 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:15,588 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:103, output treesize:99 [2020-11-29 18:14:15,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 18:14:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:15,975 INFO L350 Elim1Store]: treesize reduction 8, result has 91.6 percent of original size [2020-11-29 18:14:15,975 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 14 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 11 case distinctions, treesize of input 111 treesize of output 193 [2020-11-29 18:14:15,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:14:15,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:15,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:15,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:14:15,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:15,983 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:16,128 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-29 18:14:16,129 INFO L625 ElimStorePlain]: treesize reduction 110, result has 49.3 percent of original size [2020-11-29 18:14:16,131 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:16,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:140, output treesize:107 [2020-11-29 18:14:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,395 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 18:14:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:16,429 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:16,430 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 110 treesize of output 199 [2020-11-29 18:14:16,431 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:16,576 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-11-29 18:14:16,577 INFO L625 ElimStorePlain]: treesize reduction 68, result has 66.5 percent of original size [2020-11-29 18:14:16,579 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:16,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:139, output treesize:135 [2020-11-29 18:14:17,051 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:17,051 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 186 [2020-11-29 18:14:17,052 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:17,175 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-11-29 18:14:17,176 INFO L625 ElimStorePlain]: treesize reduction 68, result has 63.0 percent of original size [2020-11-29 18:14:17,183 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-11-29 18:14:17,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:122, output treesize:116 [2020-11-29 18:14:17,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:17,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:17,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 18:14:17,841 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-11-29 18:14:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 18:14:17,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:17,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-11-29 18:14:17,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945966882] [2020-11-29 18:14:17,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 18:14:17,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:17,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 18:14:17,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-11-29 18:14:17,984 INFO L87 Difference]: Start difference. First operand 387 states and 513 transitions. Second operand 28 states. [2020-11-29 18:14:18,594 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-11-29 18:14:18,800 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-11-29 18:14:18,977 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-11-29 18:14:19,324 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-11-29 18:14:19,462 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-11-29 18:14:19,674 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-11-29 18:14:22,235 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 75 [2020-11-29 18:14:22,489 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-11-29 18:14:22,870 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 90 [2020-11-29 18:14:23,398 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2020-11-29 18:14:23,839 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-11-29 18:14:24,613 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-11-29 18:14:25,052 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2020-11-29 18:14:25,833 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2020-11-29 18:14:26,272 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-29 18:14:26,779 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-11-29 18:14:27,101 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2020-11-29 18:14:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:27,231 INFO L93 Difference]: Finished difference Result 456 states and 592 transitions. [2020-11-29 18:14:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 18:14:27,232 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-11-29 18:14:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:27,234 INFO L225 Difference]: With dead ends: 456 [2020-11-29 18:14:27,234 INFO L226 Difference]: Without dead ends: 414 [2020-11-29 18:14:27,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=513, Invalid=2456, Unknown=1, NotChecked=0, Total=2970 [2020-11-29 18:14:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-11-29 18:14:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 390. [2020-11-29 18:14:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-29 18:14:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 517 transitions. [2020-11-29 18:14:27,280 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 517 transitions. Word has length 37 [2020-11-29 18:14:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:27,280 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 517 transitions. [2020-11-29 18:14:27,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 18:14:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 517 transitions. [2020-11-29 18:14:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 18:14:27,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:27,282 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:27,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:27,496 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1571641544, now seen corresponding path program 1 times [2020-11-29 18:14:27,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198273650] [2020-11-29 18:14:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:27,848 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-11-29 18:14:28,440 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-11-29 18:14:28,669 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 62 [2020-11-29 18:14:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:14:28,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198273650] [2020-11-29 18:14:28,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975548187] [2020-11-29 18:14:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:14:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:14:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 18:14:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:14:28,950 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2020-11-29 18:14:28,951 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:28,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:28,985 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:28,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:55 [2020-11-29 18:14:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:29,081 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:29,081 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 78 [2020-11-29 18:14:29,082 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,145 INFO L625 ElimStorePlain]: treesize reduction 28, result has 70.2 percent of original size [2020-11-29 18:14:29,145 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,145 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:66 [2020-11-29 18:14:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:29,327 INFO L350 Elim1Store]: treesize reduction 20, result has 61.5 percent of original size [2020-11-29 18:14:29,328 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 86 [2020-11-29 18:14:29,329 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,386 INFO L625 ElimStorePlain]: treesize reduction 40, result has 63.0 percent of original size [2020-11-29 18:14:29,387 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:59 [2020-11-29 18:14:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 18:14:29,578 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:14:29,578 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 107 [2020-11-29 18:14:29,579 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,627 INFO L625 ElimStorePlain]: treesize reduction 80, result has 48.1 percent of original size [2020-11-29 18:14:29,627 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:29,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:74 [2020-11-29 18:14:29,999 INFO L350 Elim1Store]: treesize reduction 8, result has 91.6 percent of original size [2020-11-29 18:14:30,000 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 161 [2020-11-29 18:14:30,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 18:14:30,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:14:30,004 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:14:30,021 INFO L625 ElimStorePlain]: treesize reduction 160, result has 0.6 percent of original size [2020-11-29 18:14:30,022 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:14:30,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:117, output treesize:1 [2020-11-29 18:14:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 18:14:30,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:14:30,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-11-29 18:14:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373378644] [2020-11-29 18:14:30,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 18:14:30,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:14:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:14:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:14:30,033 INFO L87 Difference]: Start difference. First operand 390 states and 517 transitions. Second operand 23 states. [2020-11-29 18:14:30,782 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2020-11-29 18:14:30,952 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 50 [2020-11-29 18:14:31,105 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2020-11-29 18:14:31,675 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-11-29 18:14:31,926 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 50 [2020-11-29 18:14:32,251 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 58 [2020-11-29 18:14:32,419 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-11-29 18:14:33,174 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-11-29 18:14:34,133 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2020-11-29 18:14:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:14:34,638 INFO L93 Difference]: Finished difference Result 631 states and 796 transitions. [2020-11-29 18:14:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 18:14:34,638 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-11-29 18:14:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:14:34,641 INFO L225 Difference]: With dead ends: 631 [2020-11-29 18:14:34,641 INFO L226 Difference]: Without dead ends: 569 [2020-11-29 18:14:34,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=427, Invalid=2435, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 18:14:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-11-29 18:14:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 411. [2020-11-29 18:14:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-11-29 18:14:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 543 transitions. [2020-11-29 18:14:34,705 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 543 transitions. Word has length 38 [2020-11-29 18:14:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:14:34,706 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 543 transitions. [2020-11-29 18:14:34,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 18:14:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 543 transitions. [2020-11-29 18:14:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 18:14:34,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:14:34,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:14:34,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 18:14:34,924 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:14:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:14:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash 729181046, now seen corresponding path program 1 times [2020-11-29 18:14:34,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:14:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819417607] [2020-11-29 18:14:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:14:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:14:34,950 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:14:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:14:34,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:14:35,008 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:14:35,008 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:14:35,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 18:14:35,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:14:35 BoogieIcfgContainer [2020-11-29 18:14:35,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:14:35,098 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:14:35,098 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:14:35,098 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:14:35,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:13:40" (3/4) ... [2020-11-29 18:14:35,100 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:14:35,177 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fee164ab-3752-41cc-873e-82beb474ddb8/bin/uautomizer/witness.graphml [2020-11-29 18:14:35,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:14:35,179 INFO L168 Benchmark]: Toolchain (without parser) took 55668.72 ms. Allocated memory was 90.2 MB in the beginning and 339.7 MB in the end (delta: 249.6 MB). Free memory was 57.5 MB in the beginning and 211.5 MB in the end (delta: -154.0 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,179 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 47.5 MB in the beginning and 47.5 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:14:35,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.54 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 57.4 MB in the beginning and 84.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.61 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 82.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,181 INFO L168 Benchmark]: Boogie Preprocessor took 37.46 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 80.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,181 INFO L168 Benchmark]: RCFGBuilder took 550.27 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 59.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,182 INFO L168 Benchmark]: TraceAbstraction took 54572.85 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 59.7 MB in the beginning and 216.7 MB in the end (delta: -157.0 MB). Peak memory consumption was 76.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,182 INFO L168 Benchmark]: Witness Printer took 80.10 ms. Allocated memory is still 339.7 MB. Free memory was 216.7 MB in the beginning and 211.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:14:35,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory was 47.5 MB in the beginning and 47.5 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.54 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 57.4 MB in the beginning and 84.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.61 ms. Allocated memory is still 109.1 MB. Free memory was 84.3 MB in the beginning and 82.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.46 ms. Allocated memory is still 109.1 MB. Free memory was 82.2 MB in the beginning and 80.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 550.27 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 59.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 54572.85 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 59.7 MB in the beginning and 216.7 MB in the end (delta: -157.0 MB). Peak memory consumption was 76.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.10 ms. Allocated memory is still 339.7 MB. Free memory was 216.7 MB in the beginning and 211.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L7] __assert_fail("0", "eureka_01-1.c", 7, "reach_error") VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 54.4s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 34.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 596 SDtfs, 2984 SDslu, 2992 SDs, 0 SdLazy, 4391 SolverSat, 1562 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 760 GetRequests, 351 SyntacticMatches, 7 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 33.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=411occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 1214 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 959 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 888 ConstructedInterpolants, 82 QuantifiedInterpolants, 516510 SizeOfPredicates, 140 NumberOfNonLiveVariables, 3731 ConjunctsInSsa, 278 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 161/363 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...