./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound5.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_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/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 e69e8e1bc4bd5185a8af3a28be0b9d3918c47771 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:16:32,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:16:32,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:16:32,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:16:32,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:16:32,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:16:32,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:16:32,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:16:32,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:16:32,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:16:32,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:16:32,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:16:32,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:16:32,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:16:32,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:16:32,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:16:32,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:16:32,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:16:32,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:16:32,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:16:32,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:16:32,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:16:32,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:16:32,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:16:32,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:16:32,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:16:32,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:16:32,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:16:32,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:16:32,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:16:32,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:16:32,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:16:32,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:16:32,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:16:32,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:16:32,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:16:32,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:16:32,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:16:32,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:16:32,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:16:32,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:16:32,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:16:32,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:16:32,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:16:32,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:16:32,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:16:32,633 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:16:32,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:16:32,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:16:32,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:16:32,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:16:32,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:16:32,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:16:32,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:16:32,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:16:32,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:16:32,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:16:32,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:16:32,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:16:32,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:16:32,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:16:32,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:16:32,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:16:32,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:16:32,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:16:32,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:16:32,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:16:32,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:16:32,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:16:32,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:16:32,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:16:32,641 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_40d7142e-6e02-433c-910e-1731ef8dd671/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e69e8e1bc4bd5185a8af3a28be0b9d3918c47771 [2020-11-29 23:16:32,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:16:32,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:16:32,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:16:32,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:16:32,994 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:16:32,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound5.c [2020-11-29 23:16:33,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/data/6e3bfc718/b5e987656be14983969f314bdba700c2/FLAGbbff22cb3 [2020-11-29 23:16:33,779 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:16:33,780 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound5.c [2020-11-29 23:16:33,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/data/6e3bfc718/b5e987656be14983969f314bdba700c2/FLAGbbff22cb3 [2020-11-29 23:16:34,138 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/data/6e3bfc718/b5e987656be14983969f314bdba700c2 [2020-11-29 23:16:34,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:16:34,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:16:34,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:16:34,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:16:34,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:16:34,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfd5851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34, skipping insertion in model container [2020-11-29 23:16:34,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:16:34,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:16:34,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:16:34,399 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:16:34,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:16:34,441 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:16:34,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34 WrapperNode [2020-11-29 23:16:34,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:16:34,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:16:34,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:16:34,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:16:34,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:16:34,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:16:34,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:16:34,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:16:34,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... [2020-11-29 23:16:34,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:16:34,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:16:34,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:16:34,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:16:34,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:16:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:16:34,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:16:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:16:34,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:16:35,014 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:16:35,015 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 23:16:35,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:16:35 BoogieIcfgContainer [2020-11-29 23:16:35,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:16:35,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:16:35,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:16:35,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:16:35,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:16:34" (1/3) ... [2020-11-29 23:16:35,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106404c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:16:35, skipping insertion in model container [2020-11-29 23:16:35,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:16:34" (2/3) ... [2020-11-29 23:16:35,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106404c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:16:35, skipping insertion in model container [2020-11-29 23:16:35,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:16:35" (3/3) ... [2020-11-29 23:16:35,027 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound5.c [2020-11-29 23:16:35,039 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:16:35,044 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:16:35,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:16:35,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:16:35,081 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:16:35,083 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:16:35,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:16:35,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:16:35,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:16:35,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:16:35,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:16:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 23:16:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 23:16:35,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:16:35,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:16:35,105 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:16:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:16:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 23:16:35,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:16:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66700534] [2020-11-29 23:16:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:16:35,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:16:35,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959426085] [2020-11-29 23:16:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:16:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:16:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:16:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:16:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:16:35,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66700534] [2020-11-29 23:16:35,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:16:35,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959426085] [2020-11-29 23:16:35,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:16:35,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:16:35,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977449762] [2020-11-29 23:16:35,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:16:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:16:35,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:16:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:16:35,467 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-29 23:16:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:16:35,543 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-29 23:16:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:16:35,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-29 23:16:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:16:35,552 INFO L225 Difference]: With dead ends: 44 [2020-11-29 23:16:35,553 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 23:16:35,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:16:35,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 23:16:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-29 23:16:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 23:16:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 23:16:35,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-11-29 23:16:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:16:35,587 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 23:16:35,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:16:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 23:16:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:16:35,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:16:35,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 23:16:35,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-29 23:16:35,803 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:16:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:16:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash 885278358, now seen corresponding path program 1 times [2020-11-29 23:16:35,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:16:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278699179] [2020-11-29 23:16:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:16:35,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:16:35,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060012522] [2020-11-29 23:16:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:16:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:16:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 23:16:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:16:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:16:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278699179] [2020-11-29 23:16:36,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:16:36,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060012522] [2020-11-29 23:16:36,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:16:36,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:16:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816411895] [2020-11-29 23:16:36,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:16:36,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:16:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:16:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:16:36,045 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-11-29 23:16:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:16:36,144 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-29 23:16:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:16:36,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 23:16:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:16:36,146 INFO L225 Difference]: With dead ends: 29 [2020-11-29 23:16:36,147 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 23:16:36,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:16:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 23:16:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-29 23:16:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:16:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 23:16:36,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-11-29 23:16:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:16:36,154 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 23:16:36,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:16:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 23:16:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:16:36,155 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:16:36,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-11-29 23:16:36,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:16:36,356 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:16:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:16:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash 542015330, now seen corresponding path program 2 times [2020-11-29 23:16:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:16:36,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686508108] [2020-11-29 23:16:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:16:36,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:16:36,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748744717] [2020-11-29 23:16:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:16:36,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:16:36,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:16:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 23:16:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:16:36,707 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-11-29 23:16:36,712 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:16:36,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:16:36,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:16:39,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:16:47,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:17:05,094 WARN L193 SmtUtils]: Spent 8.71 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-29 23:17:07,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:17:15,348 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* .cse1 ULTIMATE.start_main_~z~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1)))))) is different from false [2020-11-29 23:17:17,362 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* .cse1 ULTIMATE.start_main_~z~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1)))))) is different from true [2020-11-29 23:17:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686508108] [2020-11-29 23:17:17,364 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:17:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748744717] [2020-11-29 23:17:17,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:17:17,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 23:17:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199835878] [2020-11-29 23:17:17,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:17:17,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:17:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:17:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=40, Unknown=3, NotChecked=12, Total=72 [2020-11-29 23:17:17,366 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-11-29 23:17:28,178 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 13 [2020-11-29 23:17:43,928 WARN L193 SmtUtils]: Spent 13.94 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-29 23:18:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:00,206 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-11-29 23:18:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:18:00,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-29 23:18:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:00,237 INFO L225 Difference]: With dead ends: 33 [2020-11-29 23:18:00,237 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 23:18:00,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=27, Invalid=64, Unknown=3, NotChecked=16, Total=110 [2020-11-29 23:18:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 23:18:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-29 23:18:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 23:18:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-29 23:18:00,244 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-11-29 23:18:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:00,244 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-29 23:18:00,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:18:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-29 23:18:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 23:18:00,245 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:00,245 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:00,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:00,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:18:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -377436604, now seen corresponding path program 1 times [2020-11-29 23:18:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:00,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218055399] [2020-11-29 23:18:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:00,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:18:00,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081393073] [2020-11-29 23:18:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:18:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:18:00,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218055399] [2020-11-29 23:18:00,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:18:00,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081393073] [2020-11-29 23:18:00,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:18:00,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:18:00,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325346206] [2020-11-29 23:18:00,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:18:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:18:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:18:00,591 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-11-29 23:18:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:01,004 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-29 23:18:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:18:01,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-29 23:18:01,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:01,006 INFO L225 Difference]: With dead ends: 27 [2020-11-29 23:18:01,006 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 23:18:01,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:18:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 23:18:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 23:18:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 23:18:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-29 23:18:01,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-11-29 23:18:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:01,012 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-29 23:18:01,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:18:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-29 23:18:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 23:18:01,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:01,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 23:18:01,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:01,214 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:18:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1892495811, now seen corresponding path program 1 times [2020-11-29 23:18:01,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:01,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132267629] [2020-11-29 23:18:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:01,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:18:01,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496586910] [2020-11-29 23:18:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:18:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 23:18:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:01,710 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-11-29 23:18:01,713 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:18:01,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:18:02,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:18:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 23:18:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132267629] [2020-11-29 23:18:02,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:18:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496586910] [2020-11-29 23:18:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:18:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:18:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991353731] [2020-11-29 23:18:02,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:18:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:18:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:18:02,386 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-11-29 23:18:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:18:07,666 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-11-29 23:18:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:18:07,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-29 23:18:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:18:07,689 INFO L225 Difference]: With dead ends: 27 [2020-11-29 23:18:07,689 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 23:18:07,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:18:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 23:18:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 23:18:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 23:18:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-29 23:18:07,696 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-11-29 23:18:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:18:07,696 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-29 23:18:07,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:18:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-29 23:18:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:18:07,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:18:07,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-11-29 23:18:07,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:07,903 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:18:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:18:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1463251502, now seen corresponding path program 3 times [2020-11-29 23:18:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:18:07,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052553154] [2020-11-29 23:18:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:18:07,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:18:07,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938808502] [2020-11-29 23:18:07,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:18:08,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:18:08,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:18:08,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:18:08,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:18:08,100 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:18:08,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:18:15,910 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-29 23:18:15,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:18:16,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:18:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 23:18:16,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052553154] [2020-11-29 23:18:16,737 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:18:16,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938808502] [2020-11-29 23:18:16,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:18:16,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:18:16,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682806298] [2020-11-29 23:18:16,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:18:16,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:18:16,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:18:16,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2020-11-29 23:18:16,739 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-11-29 23:18:32,117 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-29 23:18:58,652 WARN L193 SmtUtils]: Spent 25.03 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 23:19:35,647 WARN L193 SmtUtils]: Spent 35.44 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-29 23:19:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:19:35,697 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-29 23:19:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:19:35,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-29 23:19:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:19:35,699 INFO L225 Difference]: With dead ends: 23 [2020-11-29 23:19:35,699 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 23:19:35,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.0s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=3, NotChecked=0, Total=90 [2020-11-29 23:19:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 23:19:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-29 23:19:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:19:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-29 23:19:35,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-11-29 23:19:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:19:35,705 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-29 23:19:35,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:19:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-29 23:19:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 23:19:35,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:19:35,705 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-11-29 23:19:35,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:35,906 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:19:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:19:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1883886344, now seen corresponding path program 2 times [2020-11-29 23:19:35,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:19:35,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628163160] [2020-11-29 23:19:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:19:35,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:19:35,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910572650] [2020-11-29 23:19:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:35,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:19:35,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:19:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:19:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:19:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:19:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628163160] [2020-11-29 23:19:36,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:19:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910572650] [2020-11-29 23:19:36,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:19:36,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 23:19:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416018882] [2020-11-29 23:19:36,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:19:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:19:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:19:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:19:36,056 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-11-29 23:19:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:19:36,376 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-11-29 23:19:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:19:36,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-29 23:19:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:19:36,378 INFO L225 Difference]: With dead ends: 28 [2020-11-29 23:19:36,378 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 23:19:36,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:19:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 23:19:36,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 23:19:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 23:19:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-29 23:19:36,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-11-29 23:19:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:19:36,387 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-29 23:19:36,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:19:36,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-29 23:19:36,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 23:19:36,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:19:36,388 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-29 23:19:36,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:36,599 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:19:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:19:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1162798676, now seen corresponding path program 3 times [2020-11-29 23:19:36,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:19:36,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052469099] [2020-11-29 23:19:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:19:36,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:19:36,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841070239] [2020-11-29 23:19:36,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:19:36,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:19:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:19:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:19:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:19:36,698 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:19:36,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:19:48,122 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-29 23:19:48,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:19:50,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:19:52,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:19:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 23:19:53,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052469099] [2020-11-29 23:19:53,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:19:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841070239] [2020-11-29 23:19:53,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:19:53,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:19:53,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363534490] [2020-11-29 23:19:53,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:19:53,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:19:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:19:53,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2020-11-29 23:19:53,005 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2020-11-29 23:19:57,200 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2020-11-29 23:20:29,346 WARN L193 SmtUtils]: Spent 26.63 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 23:21:02,263 WARN L193 SmtUtils]: Spent 32.85 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-29 23:21:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:21:07,013 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-29 23:21:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:21:07,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-29 23:21:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:21:07,016 INFO L225 Difference]: With dead ends: 24 [2020-11-29 23:21:07,016 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 23:21:07,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=28, Invalid=43, Unknown=1, NotChecked=0, Total=72 [2020-11-29 23:21:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 23:21:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 23:21:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 23:21:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:21:07,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-11-29 23:21:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:21:07,018 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:21:07,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:21:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:21:07,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 23:21:07,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-29 23:21:07,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 23:21:11,146 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-11-29 23:21:50,512 WARN L193 SmtUtils]: Spent 39.35 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-29 23:21:50,514 INFO L270 CegarLoopResult]: At program point L15-1(lines 37 38) the Hoare annotation is: (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~x~0) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))) (or (and .cse0 .cse1 (or (let ((.cse2 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (let ((.cse3 (div .cse2 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse3) (+ (* .cse3 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)))) (= ULTIMATE.start_main_~y~0 0))) (and (<= ~counter~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~y~0 1)))) [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-29 23:21:50,514 INFO L277 CegarLoopResult]: At program point L15-3(lines 14 20) the Hoare annotation is: true [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2020-11-29 23:21:50,514 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 43) the Hoare annotation is: (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (let ((.cse0 (= ULTIMATE.start_main_~z~0 0))) (or (and (= ULTIMATE.start_main_~y~0 0) .cse0) (let ((.cse1 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse1 ULTIMATE.start_main_~z~0) 0) (let ((.cse2 (div .cse1 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse2) (+ (* .cse2 ULTIMATE.start_main_~z~0) 1))) (not .cse0)))))) (and (= ULTIMATE.start_main_~x~0 1) (<= ~counter~0 0) (= ULTIMATE.start_main_~y~0 1))) [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point L34-4(lines 34 43) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-29 23:21:50,515 INFO L277 CegarLoopResult]: At program point L45(lines 24 46) the Hoare annotation is: true [2020-11-29 23:21:50,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:21:50 BoogieIcfgContainer [2020-11-29 23:21:50,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:21:50,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:21:50,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:21:50,540 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:21:50,540 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:16:35" (3/4) ... [2020-11-29 23:21:50,543 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 23:21:50,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 23:21:50,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 23:21:50,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:21:50,552 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 23:21:50,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_40d7142e-6e02-433c-910e-1731ef8dd671/bin/uautomizer/witness.graphml [2020-11-29 23:21:50,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:21:50,592 INFO L168 Benchmark]: Toolchain (without parser) took 316443.02 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 54.7 MB in the beginning and 79.4 MB in the end (delta: -24.7 MB). Peak memory consumption was 3.9 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,592 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 43.5 MB in the beginning and 43.4 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:21:50,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.38 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 54.5 MB in the beginning and 92.3 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 115.3 MB. Free memory was 92.3 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,593 INFO L168 Benchmark]: Boogie Preprocessor took 44.72 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.2 MB in the end (delta: 739.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:21:50,594 INFO L168 Benchmark]: RCFGBuilder took 482.23 ms. Allocated memory is still 115.3 MB. Free memory was 89.6 MB in the beginning and 77.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,594 INFO L168 Benchmark]: TraceAbstraction took 315512.33 ms. Allocated memory is still 115.3 MB. Free memory was 77.0 MB in the beginning and 81.5 MB in the end (delta: -4.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,595 INFO L168 Benchmark]: Witness Printer took 51.28 ms. Allocated memory is still 115.3 MB. Free memory was 81.5 MB in the beginning and 79.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:21:50,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 43.5 MB in the beginning and 43.4 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.38 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 54.5 MB in the beginning and 92.3 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 115.3 MB. Free memory was 92.3 MB in the beginning and 91.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.72 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 90.2 MB in the end (delta: 739.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 482.23 ms. Allocated memory is still 115.3 MB. Free memory was 89.6 MB in the beginning and 77.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 315512.33 ms. Allocated memory is still 115.3 MB. Free memory was 77.0 MB in the beginning and 81.5 MB in the end (delta: -4.4 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. * Witness Printer took 51.28 ms. Allocated memory is still 115.3 MB. Free memory was 81.5 MB in the beginning and 79.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (1 == cond && ((y == 0 && z == 0) || (((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)))) || ((x == 1 && counter <= 0) && y == 1) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((1 == cond && z * y + x == z * x + 1) && ((((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)) || y == 0)) || (((counter <= 1 && 1 == cond) && z * y + x == z * x + 1) && y == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 272.1s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 202.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 43.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 86 SDslu, 188 SDs, 0 SdLazy, 163 SolverSat, 38 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 49.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 189.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 17 NumberOfFragments, 142 HoareAnnotationTreeSize, 4 FomulaSimplifications, 284 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 143 FormulaSimplificationTreeSizeReductionInter, 43.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 67.4s InterpolantComputationTime, 122 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 114 ConstructedInterpolants, 2 QuantifiedInterpolants, 13304 SizeOfPredicates, 44 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 64/104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...