./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.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_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 8ea3cfac41e08dd5e08ea3d6d4b47f07715ae432 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:45,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:45,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:45,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:45,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:45,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:45,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:45,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:45,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:45,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:45,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:45,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:45,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:45,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:45,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:45,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:45,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:45,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:45,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:45,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:45,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:45,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:45,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:45,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:45,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:45,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:45,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:45,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:45,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:45,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:45,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:45,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:45,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:45,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:45,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:45,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:45,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:45,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:45,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:45,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:45,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:45,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:10:45,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:45,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:45,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:45,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:45,228 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:45,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:45,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:45,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:10:45,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:45,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:45,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:45,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:45,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:45,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:45,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:45,231 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:45,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:45,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:45,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:45,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:45,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:45,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:45,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:45,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:45,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:45,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:10:45,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:10:45,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:45,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:45,236 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_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ea3cfac41e08dd5e08ea3d6d4b47f07715ae432 [2020-11-30 01:10:45,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:45,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:45,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:45,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:45,580 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:45,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c [2020-11-30 01:10:45,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/data/aaa6ab0c6/0612109a36bd4e74b349ec3382915b81/FLAGb9a2f8cbc [2020-11-30 01:10:46,309 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:46,309 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound5.c [2020-11-30 01:10:46,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/data/aaa6ab0c6/0612109a36bd4e74b349ec3382915b81/FLAGb9a2f8cbc [2020-11-30 01:10:46,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/data/aaa6ab0c6/0612109a36bd4e74b349ec3382915b81 [2020-11-30 01:10:46,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:46,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:46,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:46,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:46,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:46,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:46,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f48eda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46, skipping insertion in model container [2020-11-30 01:10:46,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:46,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:46,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:46,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:46,925 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:46,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:46,981 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:46,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46 WrapperNode [2020-11-30 01:10:46,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:46,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:46,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:46,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:46,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:47,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:47,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:47,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:47,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... [2020-11-30 01:10:47,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:47,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:47,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:47,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:47,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:10:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:47,453 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:47,453 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-30 01:10:47,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:47 BoogieIcfgContainer [2020-11-30 01:10:47,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:47,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:47,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:47,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:47,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:46" (1/3) ... [2020-11-30 01:10:47,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e07e3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:47, skipping insertion in model container [2020-11-30 01:10:47,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:46" (2/3) ... [2020-11-30 01:10:47,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e07e3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:47, skipping insertion in model container [2020-11-30 01:10:47,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:47" (3/3) ... [2020-11-30 01:10:47,488 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound5.c [2020-11-30 01:10:47,502 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:47,507 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 01:10:47,535 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 01:10:47,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:47,572 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:47,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:47,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:47,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:47,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:47,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:47,574 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-30 01:10:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:10:47,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:47,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:47,599 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-11-30 01:10:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125728561] [2020-11-30 01:10:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:47,791 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 01:10:47,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125728561] [2020-11-30 01:10:47,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:47,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:10:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196227750] [2020-11-30 01:10:47,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:10:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:10:47,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:47,819 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-30 01:10:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:47,839 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-30 01:10:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:10:47,841 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-30 01:10:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:47,851 INFO L225 Difference]: With dead ends: 39 [2020-11-30 01:10:47,852 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:10:47,855 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 01:10:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:10:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:10:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:10:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-30 01:10:47,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-11-30 01:10:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:47,943 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-30 01:10:47,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:10:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-30 01:10:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:10:47,945 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:47,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:47,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:10:47,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:47,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-11-30 01:10:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:47,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683110903] [2020-11-30 01:10:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:47,978 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:47,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120283033] [2020-11-30 01:10:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 01:10:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:48,256 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:48,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:48,371 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 01:10:48,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683110903] [2020-11-30 01:10:48,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:48,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120283033] [2020-11-30 01:10:48,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:48,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 01:10:48,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713599781] [2020-11-30 01:10:48,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:10:48,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:10:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:48,383 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-11-30 01:10:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:48,621 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-30 01:10:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:10:48,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:10:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:48,623 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:10:48,623 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:10:48,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:10:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:10:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-30 01:10:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 01:10:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-30 01:10:48,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-11-30 01:10:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:48,631 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-30 01:10:48,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:10:48,631 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-30 01:10:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:48,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:48,632 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:48,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 01:10:48,853 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1122200418, now seen corresponding path program 1 times [2020-11-30 01:10:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:48,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020964097] [2020-11-30 01:10:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:48,888 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:48,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868244253] [2020-11-30 01:10:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-30 01:10:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:49,023 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:49,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:49,221 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 01:10:49,227 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:10:49,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:49,485 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 01:10:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020964097] [2020-11-30 01:10:49,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868244253] [2020-11-30 01:10:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-30 01:10:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132505408] [2020-11-30 01:10:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:49,489 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-11-30 01:10:49,787 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-11-30 01:10:53,512 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-11-30 01:10:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:54,669 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-30 01:10:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:10:54,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 01:10:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:54,673 INFO L225 Difference]: With dead ends: 35 [2020-11-30 01:10:54,673 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 01:10:54,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:10:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 01:10:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-11-30 01:10:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:10:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 01:10:54,697 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-11-30 01:10:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:54,698 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 01:10:54,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:10:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 01:10:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:54,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:54,699 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:54,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:54,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1120353376, now seen corresponding path program 1 times [2020-11-30 01:10:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:54,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638236449] [2020-11-30 01:10:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:54,927 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391813129] [2020-11-30 01:10:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 01:10:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:55,140 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 01:10:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638236449] [2020-11-30 01:10:55,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391813129] [2020-11-30 01:10:55,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:55,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 01:10:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619161019] [2020-11-30 01:10:55,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:10:55,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:10:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:10:55,144 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-11-30 01:10:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:55,448 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-11-30 01:10:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:10:55,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-30 01:10:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:55,450 INFO L225 Difference]: With dead ends: 37 [2020-11-30 01:10:55,450 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 01:10:55,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:10:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 01:10:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-11-30 01:10:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:10:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 01:10:55,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2020-11-30 01:10:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:55,460 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 01:10:55,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:10:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 01:10:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:10:55,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:55,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:55,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:55,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 558640405, now seen corresponding path program 1 times [2020-11-30 01:10:55,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105613819] [2020-11-30 01:10:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:55,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:55,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767362584] [2020-11-30 01:10:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:10:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:55,802 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:55,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:55,973 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 01:10:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105613819] [2020-11-30 01:10:55,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:55,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767362584] [2020-11-30 01:10:55,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:55,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 01:10:55,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673872028] [2020-11-30 01:10:55,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:10:55,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:10:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:10:55,982 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-11-30 01:10:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:56,349 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-30 01:10:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:10:56,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-30 01:10:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:56,355 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:10:56,355 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 01:10:56,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:10:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 01:10:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-30 01:10:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:10:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-30 01:10:56,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2020-11-30 01:10:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:56,365 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-30 01:10:56,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:10:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-30 01:10:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:10:56,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:56,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:56,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:56,578 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash -250706221, now seen corresponding path program 1 times [2020-11-30 01:10:56,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:56,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013994209] [2020-11-30 01:10:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:56,612 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060082475] [2020-11-30 01:10:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:10:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:56,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:56,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:10:56,970 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 01:10:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013994209] [2020-11-30 01:10:56,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060082475] [2020-11-30 01:10:56,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:56,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-30 01:10:56,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638473497] [2020-11-30 01:10:56,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:10:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:10:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:10:56,973 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-11-30 01:10:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:57,245 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-30 01:10:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:10:57,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-30 01:10:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:57,248 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:10:57,248 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:10:57,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:10:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:10:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-11-30 01:10:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:10:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:10:57,259 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-11-30 01:10:57,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:57,259 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:10:57,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:10:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:10:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:10:57,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:57,261 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:57,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:10:57,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 32148948, now seen corresponding path program 2 times [2020-11-30 01:10:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:57,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910577750] [2020-11-30 01:10:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:57,503 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:57,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892374882] [2020-11-30 01:10:57,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:57,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:57,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-30 01:10:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:57,649 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:57,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:57,706 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:57,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910577750] [2020-11-30 01:10:58,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892374882] [2020-11-30 01:10:58,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:58,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-30 01:10:58,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3241315] [2020-11-30 01:10:58,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:10:58,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:10:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:10:58,196 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 14 states. [2020-11-30 01:10:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:59,288 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-30 01:10:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:10:59,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-11-30 01:10:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:59,294 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:10:59,294 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 01:10:59,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:10:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 01:10:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-11-30 01:10:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:10:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-11-30 01:10:59,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2020-11-30 01:10:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:59,309 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-11-30 01:10:59,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:10:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-11-30 01:10:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:10:59,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:59,310 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:59,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:59,522 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 33995990, now seen corresponding path program 1 times [2020-11-30 01:10:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:59,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840599812] [2020-11-30 01:10:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:59,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:10:59,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470383373] [2020-11-30 01:10:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:10:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:10:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:59,628 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:10:59,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:59,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840599812] [2020-11-30 01:10:59,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:10:59,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470383373] [2020-11-30 01:10:59,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:10:59,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-30 01:10:59,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69983580] [2020-11-30 01:10:59,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:59,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:59,835 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2020-11-30 01:11:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:00,349 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-11-30 01:11:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:11:00,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-11-30 01:11:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:00,354 INFO L225 Difference]: With dead ends: 48 [2020-11-30 01:11:00,354 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 01:11:00,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:11:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 01:11:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-30 01:11:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 01:11:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-11-30 01:11:00,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2020-11-30 01:11:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:00,364 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-11-30 01:11:00,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:11:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-11-30 01:11:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:11:00,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:00,365 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:00,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:00,584 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:00,584 INFO L82 PathProgramCache]: Analyzing trace with hash -360878062, now seen corresponding path program 2 times [2020-11-30 01:11:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090363497] [2020-11-30 01:11:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:00,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:00,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052786342] [2020-11-30 01:11:00,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:11:00,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:11:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:00,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-30 01:11:00,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:00,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090363497] [2020-11-30 01:11:00,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:00,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052786342] [2020-11-30 01:11:00,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:00,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 01:11:00,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457816768] [2020-11-30 01:11:00,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:11:00,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:00,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:11:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:11:00,820 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-11-30 01:11:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:01,166 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-30 01:11:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:11:01,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-30 01:11:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:01,168 INFO L225 Difference]: With dead ends: 53 [2020-11-30 01:11:01,168 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:11:01,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:11:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:11:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-30 01:11:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:11:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-30 01:11:01,177 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-30 01:11:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:01,177 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-30 01:11:01,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:11:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-30 01:11:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 01:11:01,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:01,178 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:01,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 01:11:01,400 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash -359031020, now seen corresponding path program 2 times [2020-11-30 01:11:01,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:01,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716917369] [2020-11-30 01:11:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:01,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:01,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307025774] [2020-11-30 01:11:01,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:11:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:11:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-30 01:11:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:01,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716917369] [2020-11-30 01:11:01,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:01,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307025774] [2020-11-30 01:11:01,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:01,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-30 01:11:01,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792038962] [2020-11-30 01:11:01,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:11:01,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:11:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:11:01,709 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2020-11-30 01:11:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:02,043 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-11-30 01:11:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:11:02,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-11-30 01:11:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:02,045 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:11:02,045 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 01:11:02,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:11:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 01:11:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-11-30 01:11:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:11:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-30 01:11:02,059 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2020-11-30 01:11:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:02,059 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-30 01:11:02,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:11:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-30 01:11:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:11:02,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:02,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:02,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:02,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -609342175, now seen corresponding path program 1 times [2020-11-30 01:11:02,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3311102] [2020-11-30 01:11:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:02,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:02,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755514344] [2020-11-30 01:11:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:11:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:11:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:11:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:02,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3311102] [2020-11-30 01:11:02,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:02,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755514344] [2020-11-30 01:11:02,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:02,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 01:11:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907795706] [2020-11-30 01:11:02,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:11:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:11:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:11:02,579 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2020-11-30 01:11:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:02,845 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-30 01:11:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:11:02,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-30 01:11:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:02,848 INFO L225 Difference]: With dead ends: 53 [2020-11-30 01:11:02,848 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:11:02,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:11:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:11:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-11-30 01:11:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:11:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-30 01:11:02,861 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2020-11-30 01:11:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:02,861 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-30 01:11:02,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:11:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-30 01:11:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 01:11:02,862 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:02,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:03,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:03,072 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1418688801, now seen corresponding path program 2 times [2020-11-30 01:11:03,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:03,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759616771] [2020-11-30 01:11:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:03,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:03,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620492549] [2020-11-30 01:11:03,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:11:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:11:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:03,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:11:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:03,340 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:03,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:03,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:03,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759616771] [2020-11-30 01:11:03,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:03,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620492549] [2020-11-30 01:11:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:03,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-30 01:11:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39648202] [2020-11-30 01:11:03,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:11:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:11:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:11:03,497 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 12 states. [2020-11-30 01:11:03,780 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-11-30 01:11:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:03,979 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-11-30 01:11:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:11:03,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-11-30 01:11:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:03,980 INFO L225 Difference]: With dead ends: 53 [2020-11-30 01:11:03,980 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:11:03,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:11:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:11:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-11-30 01:11:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 01:11:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-30 01:11:03,992 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2020-11-30 01:11:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:03,992 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-30 01:11:03,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:11:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-30 01:11:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:03,993 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:04,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 01:11:04,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash -132782498, now seen corresponding path program 3 times [2020-11-30 01:11:04,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:04,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753383489] [2020-11-30 01:11:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:04,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:04,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505088311] [2020-11-30 01:11:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/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 01:11:04,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:11:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-30 01:11:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:04,381 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:04,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:04,416 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:04,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:04,535 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:04,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:04,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 01:11:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753383489] [2020-11-30 01:11:04,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:04,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505088311] [2020-11-30 01:11:04,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:04,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-30 01:11:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689697487] [2020-11-30 01:11:04,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:11:04,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:11:04,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:11:04,802 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 12 states. [2020-11-30 01:11:05,112 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-11-30 01:11:05,285 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-11-30 01:11:05,603 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-11-30 01:11:06,067 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-11-30 01:11:06,287 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-11-30 01:11:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:06,346 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-11-30 01:11:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:11:06,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-11-30 01:11:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:06,348 INFO L225 Difference]: With dead ends: 57 [2020-11-30 01:11:06,348 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:11:06,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:11:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:11:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-11-30 01:11:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:11:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-30 01:11:06,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-30 01:11:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:06,362 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-30 01:11:06,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:11:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-30 01:11:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:06,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:06,363 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:06,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 01:11:06,572 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -130935456, now seen corresponding path program 3 times [2020-11-30 01:11:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:06,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531745502] [2020-11-30 01:11:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:06,584 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573888815] [2020-11-30 01:11:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:06,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:11:06,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 01:11:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:06,680 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:06,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:06,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:06,877 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-30 01:11:06,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:07,064 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:07,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:07,351 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-30 01:11:07,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:07,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:11:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531745502] [2020-11-30 01:11:07,595 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573888815] [2020-11-30 01:11:07,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-30 01:11:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340826580] [2020-11-30 01:11:07,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:11:07,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:11:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:11:07,597 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 14 states. [2020-11-30 01:11:07,873 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-11-30 01:11:08,201 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-11-30 01:11:08,452 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-11-30 01:11:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:08,717 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-30 01:11:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:11:08,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-30 01:11:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:08,718 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:11:08,718 INFO L226 Difference]: Without dead ends: 52 [2020-11-30 01:11:08,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:11:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-30 01:11:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-11-30 01:11:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:11:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-30 01:11:08,732 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-30 01:11:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:08,732 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-30 01:11:08,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:11:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-30 01:11:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:08,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:08,733 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:08,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:11:08,960 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -525809508, now seen corresponding path program 4 times [2020-11-30 01:11:08,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:08,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302185723] [2020-11-30 01:11:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:08,984 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:08,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332459344] [2020-11-30 01:11:08,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:09,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:11:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:09,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-30 01:11:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302185723] [2020-11-30 01:11:09,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332459344] [2020-11-30 01:11:09,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:09,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-30 01:11:09,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173401054] [2020-11-30 01:11:09,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:11:09,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:09,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:11:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:11:09,660 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 13 states. [2020-11-30 01:11:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:10,307 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-30 01:11:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:11:10,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-30 01:11:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:10,308 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:11:10,308 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 01:11:10,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:11:10,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 01:11:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-11-30 01:11:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:11:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-30 01:11:10,322 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2020-11-30 01:11:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:10,322 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-30 01:11:10,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:11:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-30 01:11:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:10,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:10,324 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:10,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:10,540 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1412646176, now seen corresponding path program 5 times [2020-11-30 01:11:10,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:10,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507368330] [2020-11-30 01:11:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:10,549 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:10,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195169706] [2020-11-30 01:11:10,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:10,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-30 01:11:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:11:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:10,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507368330] [2020-11-30 01:11:10,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:10,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195169706] [2020-11-30 01:11:10,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:10,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 01:11:10,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421371142] [2020-11-30 01:11:10,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:11:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:10,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:11:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:11:10,795 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-11-30 01:11:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:10,996 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-30 01:11:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:11:10,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-30 01:11:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:10,998 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:11:10,998 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:11:10,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:11:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:11:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-30 01:11:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-30 01:11:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-11-30 01:11:11,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 24 [2020-11-30 01:11:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:11,016 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-11-30 01:11:11,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:11:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-11-30 01:11:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:11,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:11,017 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:11,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:11:11,240 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1410799134, now seen corresponding path program 6 times [2020-11-30 01:11:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:11,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129414887] [2020-11-30 01:11:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:11,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:11,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951142492] [2020-11-30 01:11:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:11,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-30 01:11:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:11,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-30 01:11:11,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:11,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129414887] [2020-11-30 01:11:11,613 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:11,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951142492] [2020-11-30 01:11:11,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:11,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-30 01:11:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869724286] [2020-11-30 01:11:11,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:11:11,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:11:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:11:11,614 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 11 states. [2020-11-30 01:11:12,352 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-30 01:11:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:12,465 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-11-30 01:11:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:11:12,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-11-30 01:11:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:12,468 INFO L225 Difference]: With dead ends: 65 [2020-11-30 01:11:12,468 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 01:11:12,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:11:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 01:11:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2020-11-30 01:11:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 01:11:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-11-30 01:11:12,489 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 24 [2020-11-30 01:11:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:12,490 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-11-30 01:11:12,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:11:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-11-30 01:11:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:12,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:12,497 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:12,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 01:11:12,716 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1805673186, now seen corresponding path program 7 times [2020-11-30 01:11:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:12,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801784885] [2020-11-30 01:11:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:12,726 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:12,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145938111] [2020-11-30 01:11:12,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:11:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 01:11:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:12,810 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:12,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:13,043 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 01:11:13,045 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:13,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:13,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:13,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801784885] [2020-11-30 01:11:13,550 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145938111] [2020-11-30 01:11:13,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:13,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-30 01:11:13,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144701206] [2020-11-30 01:11:13,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:11:13,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:11:13,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:11:13,552 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 12 states. [2020-11-30 01:11:14,454 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-11-30 01:11:15,089 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-11-30 01:11:15,396 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-11-30 01:11:15,859 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-11-30 01:11:16,640 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-11-30 01:11:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:16,932 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-11-30 01:11:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:11:16,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-11-30 01:11:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:16,936 INFO L225 Difference]: With dead ends: 71 [2020-11-30 01:11:16,937 INFO L226 Difference]: Without dead ends: 69 [2020-11-30 01:11:16,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:11:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-30 01:11:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-11-30 01:11:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 01:11:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-11-30 01:11:16,955 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2020-11-30 01:11:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:16,956 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-11-30 01:11:16,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:11:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-11-30 01:11:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:11:16,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:16,957 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:17,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 01:11:17,176 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1803826144, now seen corresponding path program 3 times [2020-11-30 01:11:17,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:17,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830288299] [2020-11-30 01:11:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:17,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:17,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833068652] [2020-11-30 01:11:17,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:18,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:11:18,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 01:11:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:18,372 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:18,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:18,428 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:18,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:18,619 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:18,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:18,936 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 01:11:19,181 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-30 01:11:19,341 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 01:11:19,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:19,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:19,760 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-11-30 01:11:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:11:19,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830288299] [2020-11-30 01:11:19,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:19,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833068652] [2020-11-30 01:11:19,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:19,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-30 01:11:19,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831165227] [2020-11-30 01:11:19,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:11:19,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:11:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:11:19,793 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 13 states. [2020-11-30 01:11:20,226 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-11-30 01:11:20,666 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-30 01:11:21,157 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-11-30 01:11:22,081 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-11-30 01:11:23,083 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-11-30 01:11:23,916 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-11-30 01:11:24,824 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-30 01:11:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:24,827 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-11-30 01:11:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:11:24,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-11-30 01:11:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:24,828 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:11:24,828 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 01:11:24,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:11:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 01:11:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-11-30 01:11:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:11:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-30 01:11:24,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2020-11-30 01:11:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:24,841 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-30 01:11:24,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:11:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-30 01:11:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 01:11:24,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:24,843 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:25,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:25,058 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1438818641, now seen corresponding path program 2 times [2020-11-30 01:11:25,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:25,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38562329] [2020-11-30 01:11:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:25,072 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:25,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961528227] [2020-11-30 01:11:25,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:25,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:11:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 01:11:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:25,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:25,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38562329] [2020-11-30 01:11:25,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961528227] [2020-11-30 01:11:25,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:11:25,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-30 01:11:25,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221953165] [2020-11-30 01:11:25,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:11:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:11:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:11:25,745 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 11 states. [2020-11-30 01:11:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:26,804 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-11-30 01:11:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:11:26,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-30 01:11:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:26,807 INFO L225 Difference]: With dead ends: 59 [2020-11-30 01:11:26,807 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 01:11:26,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:11:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 01:11:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-30 01:11:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:11:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-30 01:11:26,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2020-11-30 01:11:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:26,825 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-30 01:11:26,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:11:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-30 01:11:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 01:11:26,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:26,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:27,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:27,032 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1661359253, now seen corresponding path program 3 times [2020-11-30 01:11:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993623451] [2020-11-30 01:11:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:27,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:27,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60343316] [2020-11-30 01:11:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:27,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:11:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-30 01:11:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:27,213 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:27,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:27,268 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:27,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:27,674 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 01:11:27,676 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:27,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:27,973 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 01:11:30,492 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-30 01:11:30,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:30,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:31,282 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-11-30 01:11:31,704 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 1 [2020-11-30 01:11:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:11:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993623451] [2020-11-30 01:11:31,762 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60343316] [2020-11-30 01:11:31,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:11:31,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-30 01:11:31,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666169984] [2020-11-30 01:11:31,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:11:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:11:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:11:31,764 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 13 states. [2020-11-30 01:11:31,982 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 14 [2020-11-30 01:11:32,210 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2020-11-30 01:11:32,953 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-11-30 01:11:34,124 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-11-30 01:11:35,252 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-30 01:11:39,637 WARN L193 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-11-30 01:11:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:40,406 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-11-30 01:11:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 01:11:40,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-11-30 01:11:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:40,407 INFO L225 Difference]: With dead ends: 67 [2020-11-30 01:11:40,407 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 01:11:40,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:11:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 01:11:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-30 01:11:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:11:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-11-30 01:11:40,421 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2020-11-30 01:11:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:40,421 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-11-30 01:11:40,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:11:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-11-30 01:11:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 01:11:40,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:40,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:40,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-30 01:11:40,636 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash 852012627, now seen corresponding path program 3 times [2020-11-30 01:11:40,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:40,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844439034] [2020-11-30 01:11:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:40,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:11:40,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272372032] [2020-11-30 01:11:40,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:40,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:11:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:40,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 01:11:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:40,958 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-30 01:11:40,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:41,089 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-30 01:11:41,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:41,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:11:41,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:42,050 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2020-11-30 01:11:42,525 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 1 [2020-11-30 01:11:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:11:42,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844439034] [2020-11-30 01:11:42,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:11:42,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272372032] [2020-11-30 01:11:42,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:11:42,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-30 01:11:42,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284362414] [2020-11-30 01:11:42,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:11:42,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:42,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:11:42,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:11:42,556 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 10 states. [2020-11-30 01:11:42,867 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-11-30 01:11:43,330 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-30 01:11:43,910 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-30 01:11:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:45,141 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-30 01:11:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:11:45,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-30 01:11:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:45,145 INFO L225 Difference]: With dead ends: 48 [2020-11-30 01:11:45,145 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:11:45,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:11:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:11:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:11:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:11:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:11:45,146 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-30 01:11:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:45,146 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:11:45,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:11:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:11:45,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:11:45,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-30 01:11:45,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:11:45,525 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 51 [2020-11-30 01:11:45,805 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 75 [2020-11-30 01:11:46,967 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-30 01:11:51,187 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-11-30 01:11:51,192 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-30 01:11:51,192 INFO L277 CegarLoopResult]: At program point L52(lines 21 53) the Hoare annotation is: true [2020-11-30 01:11:51,192 INFO L274 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-11-30 01:11:51,192 INFO L274 CegarLoopResult]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L40(lines 40 45) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~Y~0 5)) (.cse1 (<= (* 2 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse2 (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0))) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (<= ULTIMATE.start_main_~X~0 5)) (.cse5 (<= 0 ULTIMATE.start_main_~Y~0))) (or (and .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~X~0) .cse1 .cse2 (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse3 .cse4 .cse5) (and .cse0 (= ULTIMATE.start_main_~x~0 0) .cse1 .cse2 (= ULTIMATE.start_main_~y~0 0) .cse3 .cse4 .cse5))) [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-11-30 01:11:51,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:11:51,194 INFO L274 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-11-30 01:11:51,194 INFO L270 CegarLoopResult]: At program point L14-1(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~Y~0 5)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= (* 2 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 2 ULTIMATE.start_main_~X~0)))) (.cse3 (= (+ (* (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0) 2) (* ULTIMATE.start_main_~Y~0 2)) (+ ULTIMATE.start_main_~v~0 (* (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0) 2) ULTIMATE.start_main_~X~0))) (.cse4 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse5 (<= ULTIMATE.start_main_~X~0 5)) (.cse6 (<= 0 ULTIMATE.start_main_~Y~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1)) .cse2 (<= 0 ULTIMATE.start_main_~X~0) .cse3 (<= (* 4 ULTIMATE.start_main_~Y~0) (+ ULTIMATE.start_main_~v~0 (* 4 ULTIMATE.start_main_~X~0))) .cse4 .cse5 .cse6) (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 0) .cse2 .cse3 (= ULTIMATE.start_main_~y~0 0) .cse4 .cse5 .cse6))) [2020-11-30 01:11:51,194 INFO L274 CegarLoopResult]: For program point L14-2(lines 14 17) no Hoare annotation was computed. [2020-11-30 01:11:51,194 INFO L277 CegarLoopResult]: At program point L14-3(lines 13 19) the Hoare annotation is: true [2020-11-30 01:11:51,194 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-30 01:11:51,194 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-11-30 01:11:51,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:11:51 BoogieIcfgContainer [2020-11-30 01:11:51,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:11:51,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:11:51,236 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:11:51,236 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:11:51,236 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:47" (3/4) ... [2020-11-30 01:11:51,239 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:11:51,251 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 01:11:51,252 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:11:51,252 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:11:51,253 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:11:51,297 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6bbc21e1-bfe4-4ec2-b007-8ba11d5cee9a/bin/uautomizer/witness.graphml [2020-11-30 01:11:51,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:11:51,299 INFO L168 Benchmark]: Toolchain (without parser) took 64607.18 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 55.9 MB in the beginning and 66.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:51,300 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:11:51,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.27 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 64.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:51,301 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.84 ms. Allocated memory is still 86.0 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:11:51,301 INFO L168 Benchmark]: Boogie Preprocessor took 29.93 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:11:51,301 INFO L168 Benchmark]: RCFGBuilder took 394.50 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 48.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:51,302 INFO L168 Benchmark]: TraceAbstraction took 63762.22 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 48.1 MB in the beginning and 70.0 MB in the end (delta: -21.9 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:51,302 INFO L168 Benchmark]: Witness Printer took 62.52 ms. Allocated memory is still 134.2 MB. Free memory was 70.0 MB in the beginning and 66.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:51,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.27 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 64.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.84 ms. Allocated memory is still 86.0 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.93 ms. Allocated memory is still 86.0 MB. Free memory was 62.8 MB in the beginning and 61.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 394.50 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 48.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 63762.22 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 48.1 MB in the beginning and 70.0 MB in the end (delta: -21.9 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. * Witness Printer took 62.52 ms. Allocated memory is still 134.2 MB. Free memory was 70.0 MB in the beginning and 66.8 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: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 7]: 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: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((Y <= 5 && 1 == cond) && x <= X + 1) && 2 * Y <= v + 2 * X) && 0 <= X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && X <= 5) && 0 <= Y) || ((((((((Y <= 5 && 1 == cond) && x == 0) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && y == 0) && cond == 1) && X <= 5) && 0 <= Y) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((((Y <= 5 && x <= X + 1) && 1 <= cond) && 0 <= X) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && 4 * Y <= v + 4 * X) && cond == 1) && X <= 5) && 0 <= Y) || (((((((Y <= 5 && x == 0) && 2 * Y <= v + 2 * X) && x * Y * 2 + Y * 2 == v + y * X * 2 + X) && y == 0) && cond == 1) && X <= 5) && 0 <= Y) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 57.7s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 34.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 255 SDtfs, 615 SDslu, 887 SDs, 0 SdLazy, 2546 SolverSat, 301 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 246 SyntacticMatches, 4 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 30.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 149 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 22 NumberOfFragments, 219 HoareAnnotationTreeSize, 4 FomulaSimplifications, 5405469 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 4 FomulaSimplificationsInter, 451 FormulaSimplificationTreeSizeReductionInter, 5.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 449 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 427 ConstructedInterpolants, 6 QuantifiedInterpolants, 133501 SizeOfPredicates, 259 NumberOfNonLiveVariables, 2038 ConjunctsInSsa, 611 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 101/287 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...