./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.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_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/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 927abfca40085ffd8a03ed58ebf935ccc46ff1be ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-30 01:30:42,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:30:42,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:30:42,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:30:42,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:30:42,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:30:42,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:30:42,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:30:42,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:30:42,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:30:42,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:30:42,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:30:42,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:30:42,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:30:42,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:30:42,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:30:42,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:30:42,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:30:42,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:30:42,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:30:42,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:30:42,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:30:42,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:30:42,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:30:42,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:30:42,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:30:42,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:30:42,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:30:42,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:30:42,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:30:42,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:30:42,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:30:42,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:30:42,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:30:42,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:30:42,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:30:42,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:30:42,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:30:42,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:30:42,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:30:42,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:30:42,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:30:42,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:30:42,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:30:42,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:30:42,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:30:42,572 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:30:42,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:30:42,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:30:42,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:30:42,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:30:42,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:30:42,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:30:42,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:30:42,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:30:42,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:30:42,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:30:42,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:30:42,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:30:42,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:30:42,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:30:42,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:30:42,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:30:42,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:30:42,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:30:42,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:30:42,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:30:42,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:30:42,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:30:42,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:30:42,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:30:42,583 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_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927abfca40085ffd8a03ed58ebf935ccc46ff1be [2020-11-30 01:30:42,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:30:42,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:30:42,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:30:42,857 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:30:42,857 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:30:42,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2020-11-30 01:30:42,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/data/429612a52/4672950fba1e4cb18aca2da66ccab2f1/FLAGff416e768 [2020-11-30 01:30:43,466 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:30:43,467 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2020-11-30 01:30:43,474 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/data/429612a52/4672950fba1e4cb18aca2da66ccab2f1/FLAGff416e768 [2020-11-30 01:30:43,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/data/429612a52/4672950fba1e4cb18aca2da66ccab2f1 [2020-11-30 01:30:43,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:30:43,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:30:43,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:30:43,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:30:43,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:30:43,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:30:43" (1/1) ... [2020-11-30 01:30:43,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2c8b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:43, skipping insertion in model container [2020-11-30 01:30:43,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:30:43" (1/1) ... [2020-11-30 01:30:43,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:30:43,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:30:44,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:30:44,070 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:30:44,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:30:44,109 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:30:44,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44 WrapperNode [2020-11-30 01:30:44,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:30:44,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:30:44,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:30:44,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:30:44,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:30:44,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:30:44,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:30:44,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:30:44,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... [2020-11-30 01:30:44,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:30:44,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:30:44,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:30:44,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:30:44,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:30:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:30:44,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:30:44,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:30:44,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:30:44,687 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:30:44,687 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-30 01:30:44,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:30:44 BoogieIcfgContainer [2020-11-30 01:30:44,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:30:44,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:30:44,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:30:44,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:30:44,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:30:43" (1/3) ... [2020-11-30 01:30:44,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:30:44, skipping insertion in model container [2020-11-30 01:30:44,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:30:44" (2/3) ... [2020-11-30 01:30:44,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:30:44, skipping insertion in model container [2020-11-30 01:30:44,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:30:44" (3/3) ... [2020-11-30 01:30:44,704 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2020-11-30 01:30:44,717 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:30:44,724 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-30 01:30:44,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-30 01:30:44,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:30:44,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:30:44,771 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:30:44,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:30:44,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:30:44,772 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:30:44,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:30:44,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:30:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-30 01:30:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:30:44,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:44,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:44,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash 120643979, now seen corresponding path program 1 times [2020-11-30 01:30:44,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:44,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892286849] [2020-11-30 01:30:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:30:44,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892286849] [2020-11-30 01:30:44,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:30:44,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:30:44,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911405760] [2020-11-30 01:30:44,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:30:44,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:30:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:30:44,976 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-11-30 01:30:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:44,991 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-11-30 01:30:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:30:44,993 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 01:30:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:45,003 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:30:45,003 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 01:30:45,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:30:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 01:30:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 01:30:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:30:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-30 01:30:45,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-11-30 01:30:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:45,037 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-30 01:30:45,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:30:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-30 01:30:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:30:45,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:45,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:45,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:30:45,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-11-30 01:30:45,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:45,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26702847] [2020-11-30 01:30:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:45,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:30:45,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356129514] [2020-11-30 01:30:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:30:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:30:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:30:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:30:45,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26702847] [2020-11-30 01:30:45,314 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:30:45,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356129514] [2020-11-30 01:30:45,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:30:45,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:30:45,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222825384] [2020-11-30 01:30:45,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:30:45,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:30:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:30:45,318 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-11-30 01:30:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:45,497 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-11-30 01:30:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:30:45,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 01:30:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:45,500 INFO L225 Difference]: With dead ends: 42 [2020-11-30 01:30:45,500 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 01:30:45,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:30:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 01:30:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-11-30 01:30:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:30:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-30 01:30:45,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2020-11-30 01:30:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:45,518 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-30 01:30:45,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:30:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-30 01:30:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:30:45,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:45,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:45,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:30:45,735 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1182851153, now seen corresponding path program 1 times [2020-11-30 01:30:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:45,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521354002] [2020-11-30 01:30:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:30:45,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521354002] [2020-11-30 01:30:45,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:30:45,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:30:45,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429274710] [2020-11-30 01:30:45,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:30:45,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:45,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:30:45,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:30:45,806 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-11-30 01:30:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:30:45,828 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-30 01:30:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:30:45,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 01:30:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:30:45,830 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:30:45,831 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:30:45,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:30:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:30:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:30:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:30:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 01:30:45,837 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-11-30 01:30:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:30:45,837 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 01:30:45,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:30:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 01:30:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:30:45,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:30:45,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:30:45,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:30:45,839 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:30:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:30:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1414799894, now seen corresponding path program 1 times [2020-11-30 01:30:45,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:30:45,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403564348] [2020-11-30 01:30:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:30:45,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:30:45,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780725851] [2020-11-30 01:30:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:30:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:30:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:30:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:30:45,986 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:30:45,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:30:46,089 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:30:46,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:30:46,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-30 01:30:56,661 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 8 [2020-11-30 01:30:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:30:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403564348] [2020-11-30 01:30:56,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:30:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780725851] [2020-11-30 01:30:56,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:30:56,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-30 01:30:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421059449] [2020-11-30 01:30:56,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:30:56,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:30:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:30:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=48, Unknown=5, NotChecked=0, Total=72 [2020-11-30 01:30:56,818 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-11-30 01:30:57,216 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-11-30 01:31:02,236 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-30 01:31:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:02,439 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-11-30 01:31:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:31:02,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-11-30 01:31:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:02,441 INFO L225 Difference]: With dead ends: 52 [2020-11-30 01:31:02,442 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:31:02,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=90, Invalid=177, Unknown=5, NotChecked=0, Total=272 [2020-11-30 01:31:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:31:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-11-30 01:31:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:31:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-11-30 01:31:02,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 11 [2020-11-30 01:31:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:02,457 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-11-30 01:31:02,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:31:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-11-30 01:31:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:31:02,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:02,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:02,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:02,659 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1922143644, now seen corresponding path program 1 times [2020-11-30 01:31:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:02,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830895478] [2020-11-30 01:31:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:02,674 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:31:02,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056440615] [2020-11-30 01:31:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 01:31:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:02,799 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:31:02,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:03,109 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-11-30 01:31:03,348 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2020-11-30 01:31:03,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:03,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:07,554 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-11-30 01:31:40,986 WARN L193 SmtUtils]: Spent 33.43 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-11-30 01:31:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:43,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830895478] [2020-11-30 01:31:43,176 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:31:43,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056440615] [2020-11-30 01:31:43,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:31:43,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:31:43,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058015962] [2020-11-30 01:31:43,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:31:43,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:43,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:31:43,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:43,179 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 8 states. [2020-11-30 01:31:43,762 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-30 01:31:44,236 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-30 01:31:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:44,685 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-11-30 01:31:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:31:44,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-30 01:31:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:44,693 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:31:44,693 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 01:31:44,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:31:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 01:31:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-11-30 01:31:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:31:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-11-30 01:31:44,703 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 13 [2020-11-30 01:31:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:44,704 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-11-30 01:31:44,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:31:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-11-30 01:31:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:31:44,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:44,705 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:44,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:44,911 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -543115935, now seen corresponding path program 1 times [2020-11-30 01:31:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:44,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578319757] [2020-11-30 01:31:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:44,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:31:44,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567676141] [2020-11-30 01:31:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:31:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:45,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578319757] [2020-11-30 01:31:45,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:31:45,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567676141] [2020-11-30 01:31:45,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:31:45,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-30 01:31:45,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697711618] [2020-11-30 01:31:45,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:31:45,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:31:45,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:31:45,054 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 5 states. [2020-11-30 01:31:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:45,144 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-11-30 01:31:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:31:45,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 01:31:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:45,148 INFO L225 Difference]: With dead ends: 49 [2020-11-30 01:31:45,148 INFO L226 Difference]: Without dead ends: 41 [2020-11-30 01:31:45,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:31:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-30 01:31:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-30 01:31:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-30 01:31:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-11-30 01:31:45,162 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 14 [2020-11-30 01:31:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:45,163 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-11-30 01:31:45,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:31:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-11-30 01:31:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:31:45,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:45,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:45,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:45,367 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -459200645, now seen corresponding path program 1 times [2020-11-30 01:31:45,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344681174] [2020-11-30 01:31:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:45,384 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:31:45,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607805980] [2020-11-30 01:31:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-30 01:31:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:45,478 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:31:45,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:47,858 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-11-30 01:31:48,159 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-11-30 01:31:48,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:48,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:31:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:48,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344681174] [2020-11-30 01:31:48,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:31:48,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607805980] [2020-11-30 01:31:48,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:31:48,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:31:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516279333] [2020-11-30 01:31:48,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:31:48,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:31:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:31:48,223 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 8 states. [2020-11-30 01:31:48,860 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-11-30 01:31:49,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:49,524 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2020-11-30 01:31:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:31:49,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-30 01:31:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:49,530 INFO L225 Difference]: With dead ends: 68 [2020-11-30 01:31:49,530 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:31:49,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:31:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:31:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-11-30 01:31:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-30 01:31:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-11-30 01:31:49,541 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 14 [2020-11-30 01:31:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:49,541 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-11-30 01:31:49,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:31:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-11-30 01:31:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:31:49,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:49,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:49,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 01:31:49,759 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1261811967, now seen corresponding path program 1 times [2020-11-30 01:31:49,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:49,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744412501] [2020-11-30 01:31:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:49,770 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:31:49,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121157144] [2020-11-30 01:31:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 01:31:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:50,299 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2020-11-30 01:31:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744412501] [2020-11-30 01:31:50,542 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:31:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121157144] [2020-11-30 01:31:50,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:31:50,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-30 01:31:50,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489137087] [2020-11-30 01:31:50,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:31:50,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:31:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:31:50,545 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 6 states. [2020-11-30 01:31:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:55,665 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-11-30 01:31:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:31:55,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 01:31:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:55,669 INFO L225 Difference]: With dead ends: 81 [2020-11-30 01:31:55,670 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 01:31:55,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:31:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 01:31:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-11-30 01:31:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-30 01:31:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-11-30 01:31:55,680 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 15 [2020-11-30 01:31:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:55,681 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-11-30 01:31:55,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:31:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-11-30 01:31:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:31:55,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:55,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:55,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:55,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1259964925, now seen corresponding path program 1 times [2020-11-30 01:31:55,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:55,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875985147] [2020-11-30 01:31:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:55,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:31:55,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760518420] [2020-11-30 01:31:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:31:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:56,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-30 01:31:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:31:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:56,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875985147] [2020-11-30 01:31:56,324 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:31:56,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760518420] [2020-11-30 01:31:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:31:56,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-30 01:31:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693163335] [2020-11-30 01:31:56,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:31:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:31:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:31:56,327 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 6 states. [2020-11-30 01:32:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:00,221 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-11-30 01:32:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:32:00,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 01:32:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:00,225 INFO L225 Difference]: With dead ends: 70 [2020-11-30 01:32:00,226 INFO L226 Difference]: Without dead ends: 68 [2020-11-30 01:32:00,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:32:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-30 01:32:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-11-30 01:32:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-30 01:32:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2020-11-30 01:32:00,237 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 15 [2020-11-30 01:32:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:00,238 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2020-11-30 01:32:00,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:32:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2020-11-30 01:32:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:32:00,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:00,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:00,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:00,455 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2083172090, now seen corresponding path program 1 times [2020-11-30 01:32:00,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:00,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156188369] [2020-11-30 01:32:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:00,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:32:00,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130098111] [2020-11-30 01:32:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:32:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:00,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:32:00,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:32:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:00,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156188369] [2020-11-30 01:32:00,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:32:00,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130098111] [2020-11-30 01:32:00,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:32:00,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:32:00,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416602790] [2020-11-30 01:32:00,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:32:00,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:00,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:32:00,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:32:00,561 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand 3 states. [2020-11-30 01:32:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:00,669 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-11-30 01:32:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:32:00,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-30 01:32:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:00,672 INFO L225 Difference]: With dead ends: 75 [2020-11-30 01:32:00,672 INFO L226 Difference]: Without dead ends: 67 [2020-11-30 01:32:00,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:32:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-30 01:32:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-11-30 01:32:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 01:32:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-11-30 01:32:00,690 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 16 [2020-11-30 01:32:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:00,691 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-11-30 01:32:00,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:32:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-11-30 01:32:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:32:00,696 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:00,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:00,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 01:32:00,911 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash 513827500, now seen corresponding path program 2 times [2020-11-30 01:32:00,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:00,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543633004] [2020-11-30 01:32:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:00,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:32:00,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666721428] [2020-11-30 01:32:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:00,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:32:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:32:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:32:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543633004] [2020-11-30 01:32:01,030 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:32:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666721428] [2020-11-30 01:32:01,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:32:01,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:32:01,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113588991] [2020-11-30 01:32:01,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:32:01,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:01,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:32:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:32:01,031 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 6 states. [2020-11-30 01:32:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:01,137 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2020-11-30 01:32:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:32:01,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-30 01:32:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:01,140 INFO L225 Difference]: With dead ends: 76 [2020-11-30 01:32:01,140 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:32:01,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:32:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:32:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-11-30 01:32:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:32:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-11-30 01:32:01,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 18 [2020-11-30 01:32:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:01,150 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-11-30 01:32:01,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:32:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-11-30 01:32:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:32:01,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:01,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:01,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:01,367 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:01,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1080670347, now seen corresponding path program 1 times [2020-11-30 01:32:01,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:01,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751336529] [2020-11-30 01:32:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:01,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:32:01,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343110191] [2020-11-30 01:32:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/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 [2020-11-30 01:32:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:32:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:01,615 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 01:32:01,617 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:32:01,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:32:01,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-30 01:32:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:01,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751336529] [2020-11-30 01:32:01,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:32:01,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343110191] [2020-11-30 01:32:01,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:32:01,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:32:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939945337] [2020-11-30 01:32:01,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:32:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:32:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:32:01,771 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 8 states. [2020-11-30 01:32:02,662 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-11-30 01:32:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:15,924 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-11-30 01:32:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:32:15,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-11-30 01:32:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:15,926 INFO L225 Difference]: With dead ends: 86 [2020-11-30 01:32:15,926 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 01:32:15,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:32:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 01:32:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-11-30 01:32:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:32:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-11-30 01:32:15,953 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2020-11-30 01:32:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:15,954 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-11-30 01:32:15,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:32:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-11-30 01:32:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:32:15,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:15,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:16,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:32:16,187 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1890016973, now seen corresponding path program 1 times [2020-11-30 01:32:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:16,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185023157] [2020-11-30 01:32:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:16,196 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:32:16,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523455717] [2020-11-30 01:32:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/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 [2020-11-30 01:32:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:32:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:32:16,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:32:16,302 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:32:16,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:32:16,406 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:32:16,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:32:16,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-30 01:32:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:32:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185023157] [2020-11-30 01:32:26,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:32:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523455717] [2020-11-30 01:32:26,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:32:26,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-30 01:32:26,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678750239] [2020-11-30 01:32:26,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:32:26,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:32:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:32:26,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=62, Unknown=5, NotChecked=0, Total=90 [2020-11-30 01:32:26,881 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 10 states. [2020-11-30 01:32:40,612 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-11-30 01:32:40,856 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-30 01:32:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:32:47,506 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-11-30 01:32:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:32:47,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-30 01:32:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:32:47,509 INFO L225 Difference]: With dead ends: 79 [2020-11-30 01:32:47,509 INFO L226 Difference]: Without dead ends: 71 [2020-11-30 01:32:47,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=144, Invalid=313, Unknown=5, NotChecked=0, Total=462 [2020-11-30 01:32:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-30 01:32:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-11-30 01:32:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-30 01:32:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-11-30 01:32:47,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 18 [2020-11-30 01:32:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:32:47,517 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-11-30 01:32:47,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:32:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-11-30 01:32:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:32:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:32:47,518 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:32:47,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 01:32:47,735 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:32:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:32:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1251243439, now seen corresponding path program 2 times [2020-11-30 01:32:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:32:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325030653] [2020-11-30 01:32:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:32:47,754 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:32:47,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421325615] [2020-11-30 01:32:47,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/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 [2020-11-30 01:32:47,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:32:47,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-30 01:32:47,816 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:32:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:32:47,839 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:32:47,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:32:47,865 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:32:48,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:32:48,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:32:48 BoogieIcfgContainer [2020-11-30 01:32:48,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:32:48,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:32:48,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:32:48,128 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:32:48,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:30:44" (3/4) ... [2020-11-30 01:32:48,131 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:32:48,192 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2d571921-93a1-46e9-a6ae-b75edfc8d1bb/bin/uautomizer/witness.graphml [2020-11-30 01:32:48,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:32:48,193 INFO L168 Benchmark]: Toolchain (without parser) took 124358.31 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 62.7 MB in the beginning and 74.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:48,194 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 49.6 MB in the beginning and 49.5 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:48,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 70.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:48,195 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.95 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:48,196 INFO L168 Benchmark]: Boogie Preprocessor took 47.83 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:48,196 INFO L168 Benchmark]: RCFGBuilder took 456.10 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 52.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:48,197 INFO L168 Benchmark]: TraceAbstraction took 123436.73 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.3 MB in the beginning and 77.7 MB in the end (delta: -25.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:32:48,198 INFO L168 Benchmark]: Witness Printer took 64.28 ms. Allocated memory is still 113.2 MB. Free memory was 77.7 MB in the beginning and 74.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:32:48,200 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 92.3 MB. Free memory was 49.6 MB in the beginning and 49.5 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 70.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 72.95 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.83 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 456.10 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 52.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 123436.73 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.3 MB in the beginning and 77.7 MB in the end (delta: -25.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 64.28 ms. Allocated memory is still 113.2 MB. Free memory was 77.7 MB in the beginning and 74.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=3] [L5] __assert_fail("0", "prod4br-ll.c", 5, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 123.3s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 52.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 283 SDtfs, 574 SDslu, 632 SDs, 0 SdLazy, 749 SolverSat, 179 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 46.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 29.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 161 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 66.2s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 16815 SizeOfPredicates, 92 NumberOfNonLiveVariables, 967 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 15/37 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...