./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 22a6d794ae7d6ac1007b3e6bed733f083c296e3e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:10:22,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:10:22,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:10:22,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:10:22,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:10:22,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:10:22,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:10:22,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:10:22,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:10:22,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:10:22,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:10:22,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:10:22,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:10:22,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:10:22,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:10:22,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:10:22,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:10:22,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:10:22,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:10:22,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:10:22,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:10:22,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:10:22,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:10:22,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:10:22,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:10:22,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:10:22,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:10:22,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:10:22,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:10:22,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:10:22,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:10:22,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:10:22,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:10:22,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:10:22,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:10:22,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:10:22,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:10:22,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:10:22,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:10:22,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:10:22,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:10:22,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:10:22,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:10:22,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:10:22,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:10:22,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:10:22,979 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:10:22,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:10:22,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:10:22,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:10:22,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:10:22,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:10:22,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:10:22,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:10:22,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:10:22,983 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:10:22,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:10:22,983 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:10:22,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:10:22,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:10:22,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:10:22,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:10:22,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:10:22,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:10:22,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:10:22,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:10:22,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:10:22,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:10:22,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:10:22,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:10:22,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:10:22,987 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_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22a6d794ae7d6ac1007b3e6bed733f083c296e3e [2020-12-01 15:10:23,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:10:23,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:10:23,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:10:23,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:10:23,377 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:10:23,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-01 15:10:23,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/data/880b899b9/d8a9798f25fc495c9e3f054389cc8809/FLAGb516b6429 [2020-12-01 15:10:24,242 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:10:24,243 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-01 15:10:24,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/data/880b899b9/d8a9798f25fc495c9e3f054389cc8809/FLAGb516b6429 [2020-12-01 15:10:24,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/data/880b899b9/d8a9798f25fc495c9e3f054389cc8809 [2020-12-01 15:10:24,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:10:24,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:10:24,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:10:24,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:10:24,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:10:24,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:10:24" (1/1) ... [2020-12-01 15:10:24,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d94d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:24, skipping insertion in model container [2020-12-01 15:10:24,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:10:24" (1/1) ... [2020-12-01 15:10:24,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:10:24,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:10:25,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:10:25,069 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:10:25,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:10:25,184 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:10:25,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25 WrapperNode [2020-12-01 15:10:25,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:10:25,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:10:25,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:10:25,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:10:25,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:10:25,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:10:25,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:10:25,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:10:25,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... [2020-12-01 15:10:25,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:10:25,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:10:25,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:10:25,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:10:25,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-01 15:10:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-01 15:10:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-01 15:10:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-01 15:10:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:10:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-01 15:10:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:10:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:10:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:10:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-01 15:10:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:10:25,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:10:25,376 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-01 15:10:25,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:10:25,982 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-01 15:10:25,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:10:25 BoogieIcfgContainer [2020-12-01 15:10:25,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:10:25,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:10:25,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:10:25,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:10:25,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:10:24" (1/3) ... [2020-12-01 15:10:25,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@927300d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:10:25, skipping insertion in model container [2020-12-01 15:10:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:10:25" (2/3) ... [2020-12-01 15:10:25,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@927300d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:10:25, skipping insertion in model container [2020-12-01 15:10:25,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:10:25" (3/3) ... [2020-12-01 15:10:25,996 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-12-01 15:10:26,013 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-01 15:10:26,013 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:10:26,017 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:10:26,018 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-01 15:10:26,095 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,095 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,095 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,096 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,096 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,096 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,098 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,098 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,099 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,099 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,100 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,100 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,101 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,101 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,101 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,102 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,103 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,103 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,104 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,104 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,105 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,105 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,105 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,105 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,106 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,106 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,108 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,108 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,108 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,108 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,109 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,109 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,109 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,110 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,111 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,111 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,111 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,112 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,112 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,112 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,113 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,113 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,113 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,113 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,114 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,114 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,115 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,115 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,115 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,115 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,116 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,116 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,116 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,119 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,119 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,120 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,120 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,120 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,130 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,130 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,130 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,131 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,131 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:10:26,136 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-01 15:10:26,149 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-01 15:10:26,188 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:10:26,188 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:10:26,189 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:10:26,189 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:10:26,189 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:10:26,189 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:10:26,189 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:10:26,190 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:10:26,208 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-01 15:10:26,211 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-12-01 15:10:26,215 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-12-01 15:10:26,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-12-01 15:10:26,289 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-12-01 15:10:26,289 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-01 15:10:26,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-12-01 15:10:26,315 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-12-01 15:10:29,524 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-01 15:10:29,791 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-01 15:10:30,282 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-01 15:10:30,455 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-01 15:10:30,868 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-01 15:10:31,066 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-01 15:10:31,084 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-12-01 15:10:31,085 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-12-01 15:10:31,092 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-01 15:10:31,108 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-01 15:10:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-01 15:10:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 15:10:31,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:31,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:10:31,121 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-12-01 15:10:31,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:31,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951700751] [2020-12-01 15:10:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:31,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951700751] [2020-12-01 15:10:31,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:31,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:10:31,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375111329] [2020-12-01 15:10:31,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:10:31,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:10:31,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:10:31,504 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-01 15:10:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:31,585 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-12-01 15:10:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:10:31,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-01 15:10:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:31,598 INFO L225 Difference]: With dead ends: 75 [2020-12-01 15:10:31,599 INFO L226 Difference]: Without dead ends: 42 [2020-12-01 15:10:31,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:10:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-01 15:10:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-01 15:10:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-01 15:10:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-12-01 15:10:31,640 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-12-01 15:10:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:31,640 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-12-01 15:10:31,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:10:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-12-01 15:10:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:10:31,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:31,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:31,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:10:31,644 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-12-01 15:10:31,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:31,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19605032] [2020-12-01 15:10:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:31,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19605032] [2020-12-01 15:10:31,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:31,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:10:31,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519768599] [2020-12-01 15:10:31,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:10:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:10:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:10:31,795 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-12-01 15:10:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:31,848 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-12-01 15:10:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:10:31,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-01 15:10:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:31,851 INFO L225 Difference]: With dead ends: 56 [2020-12-01 15:10:31,851 INFO L226 Difference]: Without dead ends: 50 [2020-12-01 15:10:31,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:10:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-01 15:10:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-01 15:10:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-01 15:10:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-01 15:10:31,889 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-01 15:10:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:31,892 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-01 15:10:31,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:10:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-01 15:10:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:10:31,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:31,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:31,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:10:31,895 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-12-01 15:10:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:31,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009492304] [2020-12-01 15:10:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009492304] [2020-12-01 15:10:32,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:32,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:10:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348533023] [2020-12-01 15:10:32,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:10:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:10:32,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:10:32,023 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-01 15:10:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:32,130 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-12-01 15:10:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:10:32,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-01 15:10:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:32,131 INFO L225 Difference]: With dead ends: 54 [2020-12-01 15:10:32,131 INFO L226 Difference]: Without dead ends: 47 [2020-12-01 15:10:32,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-01 15:10:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-12-01 15:10:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-01 15:10:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-12-01 15:10:32,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-12-01 15:10:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:32,140 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-12-01 15:10:32,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:10:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-12-01 15:10:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:10:32,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:32,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:32,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:10:32,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-12-01 15:10:32,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:32,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883458514] [2020-12-01 15:10:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:32,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883458514] [2020-12-01 15:10:32,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:32,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:10:32,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734221777] [2020-12-01 15:10:32,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:10:32,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:10:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:10:32,232 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-12-01 15:10:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:32,335 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-12-01 15:10:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:10:32,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-01 15:10:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:32,339 INFO L225 Difference]: With dead ends: 84 [2020-12-01 15:10:32,339 INFO L226 Difference]: Without dead ends: 77 [2020-12-01 15:10:32,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-01 15:10:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-12-01 15:10:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-01 15:10:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-12-01 15:10:32,349 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-12-01 15:10:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:32,350 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-12-01 15:10:32,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:10:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-12-01 15:10:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:10:32,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:32,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:32,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 15:10:32,352 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-12-01 15:10:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:32,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737484051] [2020-12-01 15:10:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737484051] [2020-12-01 15:10:32,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:32,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:10:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690994452] [2020-12-01 15:10:32,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:10:32,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:10:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:10:32,446 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-12-01 15:10:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:32,543 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-12-01 15:10:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:10:32,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-01 15:10:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:32,545 INFO L225 Difference]: With dead ends: 61 [2020-12-01 15:10:32,545 INFO L226 Difference]: Without dead ends: 50 [2020-12-01 15:10:32,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-01 15:10:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-12-01 15:10:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-01 15:10:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-12-01 15:10:32,553 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-12-01 15:10:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:32,554 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-12-01 15:10:32,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:10:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-12-01 15:10:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:10:32,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:32,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:32,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 15:10:32,555 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-12-01 15:10:32,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:32,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756025676] [2020-12-01 15:10:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:32,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756025676] [2020-12-01 15:10:32,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:10:32,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:10:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775385359] [2020-12-01 15:10:32,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:10:32,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:10:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:10:32,666 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-12-01 15:10:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:32,758 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-01 15:10:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:10:32,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-01 15:10:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:32,762 INFO L225 Difference]: With dead ends: 55 [2020-12-01 15:10:32,762 INFO L226 Difference]: Without dead ends: 49 [2020-12-01 15:10:32,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-01 15:10:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-12-01 15:10:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-01 15:10:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-12-01 15:10:32,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-12-01 15:10:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:32,778 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-12-01 15:10:32,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:10:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-12-01 15:10:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:10:32,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:32,779 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:32,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 15:10:32,779 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-12-01 15:10:32,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:32,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199443937] [2020-12-01 15:10:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:32,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199443937] [2020-12-01 15:10:32,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666669242] [2020-12-01 15:10:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:32,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:32,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:10:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:33,064 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:33,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:33,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-01 15:10:33,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090136050] [2020-12-01 15:10:33,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:10:33,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:10:33,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:10:33,077 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-12-01 15:10:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:33,253 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-12-01 15:10:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:10:33,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-01 15:10:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:33,254 INFO L225 Difference]: With dead ends: 55 [2020-12-01 15:10:33,254 INFO L226 Difference]: Without dead ends: 50 [2020-12-01 15:10:33,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:10:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-01 15:10:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-12-01 15:10:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-01 15:10:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-01 15:10:33,259 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-12-01 15:10:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:33,260 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-01 15:10:33,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:10:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-01 15:10:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:10:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:33,261 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:33,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-01 15:10:33,462 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-12-01 15:10:33,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:33,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941771604] [2020-12-01 15:10:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:33,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941771604] [2020-12-01 15:10:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597124493] [2020-12-01 15:10:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:33,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-01 15:10:33,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:10:33,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:33,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:33,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-01 15:10:33,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920400198] [2020-12-01 15:10:33,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:10:33,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:10:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:10:33,676 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-12-01 15:10:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:33,893 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-12-01 15:10:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:10:33,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-01 15:10:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:33,895 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:10:33,895 INFO L226 Difference]: Without dead ends: 55 [2020-12-01 15:10:33,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:10:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-01 15:10:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-12-01 15:10:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-01 15:10:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-12-01 15:10:33,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-12-01 15:10:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:33,900 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-12-01 15:10:33,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:10:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-12-01 15:10:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:10:33,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:33,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:34,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:34,116 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-12-01 15:10:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:34,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942024325] [2020-12-01 15:10:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942024325] [2020-12-01 15:10:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141634625] [2020-12-01 15:10:34,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:10:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:34,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:34,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-01 15:10:34,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352574395] [2020-12-01 15:10:34,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:10:34,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:10:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:10:34,436 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-12-01 15:10:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:34,570 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-12-01 15:10:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:10:34,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-01 15:10:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:34,572 INFO L225 Difference]: With dead ends: 56 [2020-12-01 15:10:34,572 INFO L226 Difference]: Without dead ends: 50 [2020-12-01 15:10:34,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:10:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-01 15:10:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-01 15:10:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-01 15:10:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-12-01 15:10:34,593 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-12-01 15:10:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:34,594 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-12-01 15:10:34,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:10:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-12-01 15:10:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:10:34,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:34,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:34,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:34,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-12-01 15:10:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:34,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781343982] [2020-12-01 15:10:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:34,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781343982] [2020-12-01 15:10:34,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009597515] [2020-12-01 15:10:34,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:35,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:35,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:10:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:35,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:35,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-01 15:10:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111549031] [2020-12-01 15:10:35,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:10:35,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:10:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:10:35,076 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-12-01 15:10:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:35,206 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-12-01 15:10:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:10:35,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-01 15:10:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:35,208 INFO L225 Difference]: With dead ends: 72 [2020-12-01 15:10:35,208 INFO L226 Difference]: Without dead ends: 66 [2020-12-01 15:10:35,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:10:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-01 15:10:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-12-01 15:10:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-01 15:10:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-12-01 15:10:35,225 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-12-01 15:10:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:35,226 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-12-01 15:10:35,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:10:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-12-01 15:10:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:10:35,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:35,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:35,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:35,444 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-12-01 15:10:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:35,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184970561] [2020-12-01 15:10:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184970561] [2020-12-01 15:10:35,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130035745] [2020-12-01 15:10:35,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:35,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-01 15:10:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:10:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:35,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:35,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:10:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694051555] [2020-12-01 15:10:35,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:10:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:10:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:35,686 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-12-01 15:10:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:35,897 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-12-01 15:10:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:10:35,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-01 15:10:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:35,900 INFO L225 Difference]: With dead ends: 68 [2020-12-01 15:10:35,900 INFO L226 Difference]: Without dead ends: 59 [2020-12-01 15:10:35,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:10:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-01 15:10:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-12-01 15:10:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-01 15:10:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-01 15:10:35,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-12-01 15:10:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:35,915 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-01 15:10:35,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:10:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-01 15:10:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:10:35,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:35,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:36,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-01 15:10:36,139 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-12-01 15:10:36,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:36,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765979651] [2020-12-01 15:10:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:36,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765979651] [2020-12-01 15:10:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147776611] [2020-12-01 15:10:36,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:36,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:10:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:10:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:36,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:36,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:36,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:10:36,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862019798] [2020-12-01 15:10:36,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:10:36,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:10:36,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:10:36,353 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-12-01 15:10:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:36,554 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-12-01 15:10:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:10:36,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-01 15:10:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:36,555 INFO L225 Difference]: With dead ends: 63 [2020-12-01 15:10:36,556 INFO L226 Difference]: Without dead ends: 58 [2020-12-01 15:10:36,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:10:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-01 15:10:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-12-01 15:10:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-01 15:10:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-12-01 15:10:36,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-12-01 15:10:36,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:36,560 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-12-01 15:10:36,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:10:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-12-01 15:10:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:10:36,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:36,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:36,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:36,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-12-01 15:10:36,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:36,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326451388] [2020-12-01 15:10:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:36,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326451388] [2020-12-01 15:10:36,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722251078] [2020-12-01 15:10:36,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:36,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-01 15:10:36,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:10:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:37,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:37,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:37,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-01 15:10:37,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264858356] [2020-12-01 15:10:37,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:10:37,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:10:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:10:37,040 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-12-01 15:10:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:37,270 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-12-01 15:10:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:10:37,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-01 15:10:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:37,273 INFO L225 Difference]: With dead ends: 63 [2020-12-01 15:10:37,274 INFO L226 Difference]: Without dead ends: 58 [2020-12-01 15:10:37,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:10:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-01 15:10:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-12-01 15:10:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-01 15:10:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-12-01 15:10:37,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-12-01 15:10:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:37,279 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-12-01 15:10:37,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:10:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-12-01 15:10:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:10:37,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:37,282 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:37,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:37,508 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:37,508 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-12-01 15:10:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:37,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789735341] [2020-12-01 15:10:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789735341] [2020-12-01 15:10:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486934733] [2020-12-01 15:10:37,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:37,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-01 15:10:37,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 15:10:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:37,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:37,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-01 15:10:37,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826519298] [2020-12-01 15:10:37,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:10:37,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:10:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:10:37,748 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-12-01 15:10:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:38,088 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-12-01 15:10:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 15:10:38,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-01 15:10:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:38,090 INFO L225 Difference]: With dead ends: 73 [2020-12-01 15:10:38,090 INFO L226 Difference]: Without dead ends: 64 [2020-12-01 15:10:38,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:10:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-01 15:10:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-12-01 15:10:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-01 15:10:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-12-01 15:10:38,099 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-12-01 15:10:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:38,100 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-12-01 15:10:38,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:10:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-12-01 15:10:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:10:38,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:38,102 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:38,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 15:10:38,304 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-12-01 15:10:38,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:38,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433439896] [2020-12-01 15:10:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:38,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433439896] [2020-12-01 15:10:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109536241] [2020-12-01 15:10:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:10:38,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:38,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:38,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-01 15:10:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554447795] [2020-12-01 15:10:38,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:10:38,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:10:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:10:38,592 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-12-01 15:10:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:38,760 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-12-01 15:10:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:10:38,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-01 15:10:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:38,762 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:10:38,762 INFO L226 Difference]: Without dead ends: 58 [2020-12-01 15:10:38,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:10:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-01 15:10:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-01 15:10:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 15:10:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-01 15:10:38,768 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-12-01 15:10:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:38,769 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-01 15:10:38,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:10:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-01 15:10:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:10:38,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:38,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:38,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-01 15:10:38,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-12-01 15:10:38,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:38,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83502347] [2020-12-01 15:10:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83502347] [2020-12-01 15:10:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942059588] [2020-12-01 15:10:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:39,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:39,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:39,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:10:39,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:39,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:39,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-01 15:10:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872524720] [2020-12-01 15:10:39,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:10:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:10:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:10:39,254 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-12-01 15:10:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:39,414 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-12-01 15:10:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:10:39,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-01 15:10:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:39,416 INFO L225 Difference]: With dead ends: 84 [2020-12-01 15:10:39,416 INFO L226 Difference]: Without dead ends: 78 [2020-12-01 15:10:39,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:10:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-01 15:10:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-12-01 15:10:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 15:10:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-01 15:10:39,420 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-12-01 15:10:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:39,421 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-01 15:10:39,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:10:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-01 15:10:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:10:39,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:39,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:39,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 15:10:39,636 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-12-01 15:10:39,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:39,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311442475] [2020-12-01 15:10:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:39,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311442475] [2020-12-01 15:10:39,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716428963] [2020-12-01 15:10:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:39,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-01 15:10:39,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:10:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-01 15:10:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210599369] [2020-12-01 15:10:39,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:10:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:10:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:10:39,904 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-12-01 15:10:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:40,283 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-12-01 15:10:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-01 15:10:40,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-01 15:10:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:40,285 INFO L225 Difference]: With dead ends: 78 [2020-12-01 15:10:40,285 INFO L226 Difference]: Without dead ends: 69 [2020-12-01 15:10:40,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:10:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-01 15:10:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-12-01 15:10:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-01 15:10:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-12-01 15:10:40,291 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-12-01 15:10:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:40,292 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-12-01 15:10:40,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:10:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-12-01 15:10:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:10:40,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:40,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:40,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 15:10:40,500 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-12-01 15:10:40,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:40,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420850218] [2020-12-01 15:10:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420850218] [2020-12-01 15:10:40,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715022697] [2020-12-01 15:10:40,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:40,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:10:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:10:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:40,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:40,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:40,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-01 15:10:40,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17292925] [2020-12-01 15:10:40,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:10:40,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:40,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:10:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:10:40,730 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-12-01 15:10:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:41,071 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-12-01 15:10:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:10:41,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-01 15:10:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:41,073 INFO L225 Difference]: With dead ends: 73 [2020-12-01 15:10:41,073 INFO L226 Difference]: Without dead ends: 68 [2020-12-01 15:10:41,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:10:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-01 15:10:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-12-01 15:10:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-01 15:10:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-12-01 15:10:41,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-12-01 15:10:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:41,078 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-12-01 15:10:41,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:10:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-12-01 15:10:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:10:41,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:41,079 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:41,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 15:10:41,296 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-12-01 15:10:41,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:41,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538844986] [2020-12-01 15:10:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:41,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538844986] [2020-12-01 15:10:41,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361563560] [2020-12-01 15:10:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:41,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-01 15:10:41,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:10:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:41,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-01 15:10:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081335834] [2020-12-01 15:10:41,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:10:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:10:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:10:41,564 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-12-01 15:10:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:41,879 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-12-01 15:10:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:10:41,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-01 15:10:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:41,880 INFO L225 Difference]: With dead ends: 71 [2020-12-01 15:10:41,880 INFO L226 Difference]: Without dead ends: 66 [2020-12-01 15:10:41,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:10:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-01 15:10:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-12-01 15:10:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-01 15:10:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-12-01 15:10:41,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-12-01 15:10:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:41,885 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-12-01 15:10:41,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:10:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-12-01 15:10:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:10:41,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:41,886 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:42,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:42,104 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-12-01 15:10:42,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:42,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975793112] [2020-12-01 15:10:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975793112] [2020-12-01 15:10:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349553509] [2020-12-01 15:10:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:42,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-01 15:10:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:10:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:42,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:42,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-01 15:10:42,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363394917] [2020-12-01 15:10:42,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:10:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:10:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:10:42,357 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-12-01 15:10:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:42,703 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-12-01 15:10:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-01 15:10:42,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-01 15:10:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:42,713 INFO L225 Difference]: With dead ends: 83 [2020-12-01 15:10:42,713 INFO L226 Difference]: Without dead ends: 74 [2020-12-01 15:10:42,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-01 15:10:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-01 15:10:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-12-01 15:10:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:10:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-12-01 15:10:42,724 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-12-01 15:10:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:42,725 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-12-01 15:10:42,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:10:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-12-01 15:10:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:10:42,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:42,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:42,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:42,939 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-12-01 15:10:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:42,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383832360] [2020-12-01 15:10:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383832360] [2020-12-01 15:10:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299880329] [2020-12-01 15:10:43,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 15:10:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:43,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:43,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-01 15:10:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162061930] [2020-12-01 15:10:43,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:10:43,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:10:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:10:43,200 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-12-01 15:10:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:43,430 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-12-01 15:10:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:10:43,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-01 15:10:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:43,439 INFO L225 Difference]: With dead ends: 72 [2020-12-01 15:10:43,439 INFO L226 Difference]: Without dead ends: 66 [2020-12-01 15:10:43,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:10:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-01 15:10:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-12-01 15:10:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-01 15:10:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-12-01 15:10:43,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-12-01 15:10:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:43,441 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-12-01 15:10:43,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:10:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-12-01 15:10:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:10:43,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:43,442 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:43,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-01 15:10:43,643 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-12-01 15:10:43,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:43,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725833734] [2020-12-01 15:10:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725833734] [2020-12-01 15:10:43,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522709008] [2020-12-01 15:10:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:43,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:43,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:10:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:43,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:43,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-01 15:10:43,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941143450] [2020-12-01 15:10:43,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:10:43,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:43,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:10:43,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:10:43,900 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-12-01 15:10:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:44,078 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-12-01 15:10:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:10:44,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-01 15:10:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:44,080 INFO L225 Difference]: With dead ends: 96 [2020-12-01 15:10:44,080 INFO L226 Difference]: Without dead ends: 90 [2020-12-01 15:10:44,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:10:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-01 15:10:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-12-01 15:10:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-01 15:10:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-12-01 15:10:44,084 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-12-01 15:10:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:44,084 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-12-01 15:10:44,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:10:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-12-01 15:10:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:10:44,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:44,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:44,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:44,312 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-12-01 15:10:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:44,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475210142] [2020-12-01 15:10:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:44,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475210142] [2020-12-01 15:10:44,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170925025] [2020-12-01 15:10:44,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:44,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 15:10:44,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 15:10:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:44,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:44,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-01 15:10:44,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321716225] [2020-12-01 15:10:44,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:10:44,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:10:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:10:44,559 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-12-01 15:10:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:44,982 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-12-01 15:10:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-01 15:10:44,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-01 15:10:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:44,985 INFO L225 Difference]: With dead ends: 88 [2020-12-01 15:10:44,985 INFO L226 Difference]: Without dead ends: 79 [2020-12-01 15:10:44,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-12-01 15:10:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-01 15:10:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-12-01 15:10:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-01 15:10:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-12-01 15:10:44,990 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-12-01 15:10:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:44,990 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-12-01 15:10:44,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:10:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-12-01 15:10:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:10:44,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:44,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:45,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-01 15:10:45,200 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-12-01 15:10:45,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:45,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028544164] [2020-12-01 15:10:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028544164] [2020-12-01 15:10:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758549823] [2020-12-01 15:10:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:45,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:10:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:10:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:45,442 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:45,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:45,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-01 15:10:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161293563] [2020-12-01 15:10:45,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:10:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:10:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:10:45,447 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-12-01 15:10:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:45,889 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-12-01 15:10:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 15:10:45,890 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-01 15:10:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:45,890 INFO L225 Difference]: With dead ends: 83 [2020-12-01 15:10:45,891 INFO L226 Difference]: Without dead ends: 78 [2020-12-01 15:10:45,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-12-01 15:10:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-01 15:10:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-12-01 15:10:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 15:10:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-01 15:10:45,894 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-12-01 15:10:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:45,895 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-01 15:10:45,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:10:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-01 15:10:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:10:45,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:45,896 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:46,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-01 15:10:46,096 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-12-01 15:10:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:46,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748447665] [2020-12-01 15:10:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:46,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748447665] [2020-12-01 15:10:46,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176890620] [2020-12-01 15:10:46,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:46,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-01 15:10:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 15:10:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:46,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:46,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:46,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-01 15:10:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839061347] [2020-12-01 15:10:46,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:10:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:10:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:10:46,380 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-12-01 15:10:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:46,841 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-12-01 15:10:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 15:10:46,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-01 15:10:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:46,842 INFO L225 Difference]: With dead ends: 79 [2020-12-01 15:10:46,843 INFO L226 Difference]: Without dead ends: 74 [2020-12-01 15:10:46,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-01 15:10:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-01 15:10:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-12-01 15:10:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 15:10:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-01 15:10:46,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-12-01 15:10:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:46,846 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-01 15:10:46,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:10:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-01 15:10:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:10:46,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:46,847 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:47,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-01 15:10:47,052 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-12-01 15:10:47,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:47,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695925791] [2020-12-01 15:10:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695925791] [2020-12-01 15:10:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051071116] [2020-12-01 15:10:47,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:47,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-01 15:10:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 15:10:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:47,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:47,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-01 15:10:47,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52041896] [2020-12-01 15:10:47,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:10:47,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:10:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:10:47,304 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-12-01 15:10:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:47,783 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-12-01 15:10:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-01 15:10:47,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-01 15:10:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:47,785 INFO L225 Difference]: With dead ends: 93 [2020-12-01 15:10:47,786 INFO L226 Difference]: Without dead ends: 84 [2020-12-01 15:10:47,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-12-01 15:10:47,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-01 15:10:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-12-01 15:10:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-01 15:10:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-12-01 15:10:47,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-12-01 15:10:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:47,791 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-12-01 15:10:47,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:10:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-12-01 15:10:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:10:47,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:47,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:48,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-01 15:10:48,008 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-12-01 15:10:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:48,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383224989] [2020-12-01 15:10:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383224989] [2020-12-01 15:10:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145509307] [2020-12-01 15:10:48,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/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 [2020-12-01 15:10:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-01 15:10:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:48,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:48,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-01 15:10:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018359652] [2020-12-01 15:10:48,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:10:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:10:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:10:48,302 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-12-01 15:10:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:48,539 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-12-01 15:10:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 15:10:48,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-12-01 15:10:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:48,540 INFO L225 Difference]: With dead ends: 80 [2020-12-01 15:10:48,540 INFO L226 Difference]: Without dead ends: 74 [2020-12-01 15:10:48,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:10:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-01 15:10:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-12-01 15:10:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-01 15:10:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-01 15:10:48,544 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-12-01 15:10:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:48,544 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-01 15:10:48,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:10:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-01 15:10:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:10:48,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:48,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:48,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-01 15:10:48,760 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1673993827, now seen corresponding path program 26 times [2020-12-01 15:10:48,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:48,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132823642] [2020-12-01 15:10:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:48,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132823642] [2020-12-01 15:10:48,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898325936] [2020-12-01 15:10:48,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:48,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:48,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:10:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:49,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:49,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-12-01 15:10:49,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615801228] [2020-12-01 15:10:49,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:10:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:10:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:10:49,005 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 14 states. [2020-12-01 15:10:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:49,324 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-12-01 15:10:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:10:49,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-12-01 15:10:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:49,327 INFO L225 Difference]: With dead ends: 108 [2020-12-01 15:10:49,327 INFO L226 Difference]: Without dead ends: 102 [2020-12-01 15:10:49,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:10:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-01 15:10:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2020-12-01 15:10:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-01 15:10:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-01 15:10:49,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-12-01 15:10:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:49,332 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-01 15:10:49,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:10:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-01 15:10:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:10:49,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:49,334 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:49,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:49,536 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1248727405, now seen corresponding path program 27 times [2020-12-01 15:10:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:49,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443133314] [2020-12-01 15:10:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443133314] [2020-12-01 15:10:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875263783] [2020-12-01 15:10:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:49,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-01 15:10:49,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:10:49,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:49,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:49,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-01 15:10:49,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237483767] [2020-12-01 15:10:49,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:10:49,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:10:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:10:49,846 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-12-01 15:10:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:50,520 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-12-01 15:10:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-01 15:10:50,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-01 15:10:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:50,522 INFO L225 Difference]: With dead ends: 98 [2020-12-01 15:10:50,522 INFO L226 Difference]: Without dead ends: 89 [2020-12-01 15:10:50,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 15:10:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-01 15:10:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-12-01 15:10:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-01 15:10:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 133 transitions. [2020-12-01 15:10:50,526 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 133 transitions. Word has length 18 [2020-12-01 15:10:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:50,526 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 133 transitions. [2020-12-01 15:10:50,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:10:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 133 transitions. [2020-12-01 15:10:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 15:10:50,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:50,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:50,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-01 15:10:50,736 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1968167459, now seen corresponding path program 28 times [2020-12-01 15:10:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:50,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072773616] [2020-12-01 15:10:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:50,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072773616] [2020-12-01 15:10:50,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545384809] [2020-12-01 15:10:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:50,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:10:50,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:10:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:51,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-01 15:10:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758554148] [2020-12-01 15:10:51,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:10:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:10:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:10:51,057 INFO L87 Difference]: Start difference. First operand 55 states and 133 transitions. Second operand 15 states. [2020-12-01 15:10:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:51,666 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-12-01 15:10:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-01 15:10:51,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-01 15:10:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:51,668 INFO L225 Difference]: With dead ends: 93 [2020-12-01 15:10:51,668 INFO L226 Difference]: Without dead ends: 88 [2020-12-01 15:10:51,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 15:10:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-01 15:10:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-12-01 15:10:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-01 15:10:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-12-01 15:10:51,673 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-12-01 15:10:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:51,674 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-12-01 15:10:51,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:10:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-12-01 15:10:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:10:51,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:51,675 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:51,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:51,904 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash -55818402, now seen corresponding path program 29 times [2020-12-01 15:10:51,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:51,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126551602] [2020-12-01 15:10:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:52,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126551602] [2020-12-01 15:10:52,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328570290] [2020-12-01 15:10:52,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:52,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-01 15:10:52,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-01 15:10:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:52,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:52,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:52,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-01 15:10:52,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230034843] [2020-12-01 15:10:52,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:10:52,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:52,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:10:52,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:10:52,239 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-12-01 15:10:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:52,826 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-12-01 15:10:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-01 15:10:52,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-01 15:10:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:52,827 INFO L225 Difference]: With dead ends: 87 [2020-12-01 15:10:52,827 INFO L226 Difference]: Without dead ends: 82 [2020-12-01 15:10:52,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-12-01 15:10:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-01 15:10:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-12-01 15:10:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-01 15:10:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-12-01 15:10:52,832 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-12-01 15:10:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:52,833 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-12-01 15:10:52,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:10:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-12-01 15:10:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:10:52,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:52,834 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-01 15:10:53,048 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash 883671691, now seen corresponding path program 30 times [2020-12-01 15:10:53,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346558590] [2020-12-01 15:10:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:53,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346558590] [2020-12-01 15:10:53,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170699245] [2020-12-01 15:10:53,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:53,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-01 15:10:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:10:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:53,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:53,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-01 15:10:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881601967] [2020-12-01 15:10:53,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:10:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:10:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:10:53,377 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 16 states. [2020-12-01 15:10:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:54,020 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-12-01 15:10:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-01 15:10:54,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-01 15:10:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:54,022 INFO L225 Difference]: With dead ends: 103 [2020-12-01 15:10:54,022 INFO L226 Difference]: Without dead ends: 94 [2020-12-01 15:10:54,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-12-01 15:10:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-01 15:10:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-12-01 15:10:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-01 15:10:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-12-01 15:10:54,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-12-01 15:10:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:54,028 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-12-01 15:10:54,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:10:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-12-01 15:10:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:10:54,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:54,029 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:54,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:54,244 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1335227574, now seen corresponding path program 31 times [2020-12-01 15:10:54,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:54,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497581856] [2020-12-01 15:10:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497581856] [2020-12-01 15:10:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51966320] [2020-12-01 15:10:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:10:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:54,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:54,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-01 15:10:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789418008] [2020-12-01 15:10:54,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:10:54,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:10:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:10:54,608 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-12-01 15:10:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:55,022 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-12-01 15:10:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-01 15:10:55,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-01 15:10:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:55,024 INFO L225 Difference]: With dead ends: 88 [2020-12-01 15:10:55,025 INFO L226 Difference]: Without dead ends: 82 [2020-12-01 15:10:55,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-12-01 15:10:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-01 15:10:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-12-01 15:10:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-01 15:10:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-12-01 15:10:55,032 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-12-01 15:10:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:55,033 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-12-01 15:10:55,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:10:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-12-01 15:10:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:10:55,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:55,034 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:55,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-01 15:10:55,248 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1904656218, now seen corresponding path program 32 times [2020-12-01 15:10:55,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:55,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305336094] [2020-12-01 15:10:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:55,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305336094] [2020-12-01 15:10:55,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288838113] [2020-12-01 15:10:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:55,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:10:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:10:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:55,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:55,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-01 15:10:55,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73709738] [2020-12-01 15:10:55,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:10:55,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:55,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:10:55,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:10:55,641 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-12-01 15:10:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:55,920 INFO L93 Difference]: Finished difference Result 120 states and 275 transitions. [2020-12-01 15:10:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-01 15:10:55,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-01 15:10:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:55,922 INFO L225 Difference]: With dead ends: 120 [2020-12-01 15:10:55,922 INFO L226 Difference]: Without dead ends: 114 [2020-12-01 15:10:55,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-12-01 15:10:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-01 15:10:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-12-01 15:10:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-01 15:10:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-12-01 15:10:55,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-12-01 15:10:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:55,928 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-12-01 15:10:55,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:10:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-12-01 15:10:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:10:55,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:55,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:56,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:56,144 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1730347856, now seen corresponding path program 33 times [2020-12-01 15:10:56,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:56,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799667877] [2020-12-01 15:10:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799667877] [2020-12-01 15:10:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325119169] [2020-12-01 15:10:56,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:56,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-01 15:10:56,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:10:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:56,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:56,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-01 15:10:56,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702701367] [2020-12-01 15:10:56,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 15:10:56,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 15:10:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:10:56,482 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-12-01 15:10:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:57,146 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-01 15:10:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-01 15:10:57,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-01 15:10:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:57,147 INFO L225 Difference]: With dead ends: 108 [2020-12-01 15:10:57,148 INFO L226 Difference]: Without dead ends: 99 [2020-12-01 15:10:57,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-12-01 15:10:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-01 15:10:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-12-01 15:10:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 15:10:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 143 transitions. [2020-12-01 15:10:57,153 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 143 transitions. Word has length 20 [2020-12-01 15:10:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:57,153 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 143 transitions. [2020-12-01 15:10:57,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 15:10:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 143 transitions. [2020-12-01 15:10:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-01 15:10:57,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:57,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:57,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-01 15:10:57,372 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1624044134, now seen corresponding path program 34 times [2020-12-01 15:10:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:57,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534765625] [2020-12-01 15:10:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:57,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534765625] [2020-12-01 15:10:57,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764331058] [2020-12-01 15:10:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:57,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:10:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:57,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:10:57,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:57,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:57,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:57,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-01 15:10:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002049065] [2020-12-01 15:10:57,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 15:10:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 15:10:57,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:10:57,702 INFO L87 Difference]: Start difference. First operand 59 states and 143 transitions. Second operand 17 states. [2020-12-01 15:10:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:58,359 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-12-01 15:10:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-01 15:10:58,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-01 15:10:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:58,360 INFO L225 Difference]: With dead ends: 103 [2020-12-01 15:10:58,360 INFO L226 Difference]: Without dead ends: 98 [2020-12-01 15:10:58,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-12-01 15:10:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-01 15:10:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-12-01 15:10:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-01 15:10:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-12-01 15:10:58,365 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-12-01 15:10:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:58,365 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-12-01 15:10:58,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 15:10:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-12-01 15:10:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 15:10:58,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:58,367 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:58,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:58,592 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2101150495, now seen corresponding path program 35 times [2020-12-01 15:10:58,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:58,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216386261] [2020-12-01 15:10:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:10:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:58,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216386261] [2020-12-01 15:10:58,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869230843] [2020-12-01 15:10:58,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:10:58,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-01 15:10:58,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:10:58,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:10:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:10:58,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:10:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:10:58,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:10:58,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-01 15:10:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399967078] [2020-12-01 15:10:58,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:10:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:10:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:10:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:10:58,960 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-12-01 15:10:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:10:59,751 INFO L93 Difference]: Finished difference Result 95 states and 231 transitions. [2020-12-01 15:10:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-01 15:10:59,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-01 15:10:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:10:59,752 INFO L225 Difference]: With dead ends: 95 [2020-12-01 15:10:59,752 INFO L226 Difference]: Without dead ends: 90 [2020-12-01 15:10:59,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-12-01 15:10:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-01 15:10:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-12-01 15:10:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-01 15:10:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-12-01 15:10:59,758 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-12-01 15:10:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:10:59,758 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-12-01 15:10:59,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:10:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-12-01 15:10:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 15:10:59,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:10:59,759 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:10:59,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-01 15:10:59,980 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:10:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:10:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1194216792, now seen corresponding path program 36 times [2020-12-01 15:10:59,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:10:59,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345310352] [2020-12-01 15:10:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:10:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:00,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345310352] [2020-12-01 15:11:00,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702357980] [2020-12-01 15:11:00,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:00,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-01 15:11:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:11:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:00,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:00,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-01 15:11:00,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665743848] [2020-12-01 15:11:00,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:11:00,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:11:00,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:11:00,311 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 18 states. [2020-12-01 15:11:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:01,057 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-12-01 15:11:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-01 15:11:01,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-01 15:11:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:01,059 INFO L225 Difference]: With dead ends: 113 [2020-12-01 15:11:01,059 INFO L226 Difference]: Without dead ends: 104 [2020-12-01 15:11:01,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-12-01 15:11:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-01 15:11:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-12-01 15:11:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-01 15:11:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-12-01 15:11:01,065 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-12-01 15:11:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:01,065 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-12-01 15:11:01,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:11:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-12-01 15:11:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:11:01,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:01,066 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:01,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-01 15:11:01,280 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1041510855, now seen corresponding path program 37 times [2020-12-01 15:11:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:01,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693255106] [2020-12-01 15:11:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:01,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693255106] [2020-12-01 15:11:01,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314428911] [2020-12-01 15:11:01,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 15:11:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:01,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:01,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-01 15:11:01,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048932005] [2020-12-01 15:11:01,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:11:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:11:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:11:01,760 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-12-01 15:11:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:02,180 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-12-01 15:11:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-01 15:11:02,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-01 15:11:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:02,182 INFO L225 Difference]: With dead ends: 96 [2020-12-01 15:11:02,182 INFO L226 Difference]: Without dead ends: 90 [2020-12-01 15:11:02,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-12-01 15:11:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-01 15:11:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-12-01 15:11:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-01 15:11:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-12-01 15:11:02,187 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-12-01 15:11:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:02,188 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-12-01 15:11:02,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:11:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-12-01 15:11:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:11:02,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:02,189 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:02,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-01 15:11:02,400 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:02,400 INFO L82 PathProgramCache]: Analyzing trace with hash -718545367, now seen corresponding path program 38 times [2020-12-01 15:11:02,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:02,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730115557] [2020-12-01 15:11:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:02,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730115557] [2020-12-01 15:11:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077002220] [2020-12-01 15:11:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:02,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:11:02,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:11:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:02,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:02,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-01 15:11:02,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502367569] [2020-12-01 15:11:02,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:11:02,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:11:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:11:02,827 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 18 states. [2020-12-01 15:11:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:03,211 INFO L93 Difference]: Finished difference Result 132 states and 303 transitions. [2020-12-01 15:11:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 15:11:03,211 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-01 15:11:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:03,213 INFO L225 Difference]: With dead ends: 132 [2020-12-01 15:11:03,213 INFO L226 Difference]: Without dead ends: 126 [2020-12-01 15:11:03,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-12-01 15:11:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-01 15:11:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 76. [2020-12-01 15:11:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-01 15:11:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-12-01 15:11:03,218 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-12-01 15:11:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:03,218 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-12-01 15:11:03,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:11:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-12-01 15:11:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:11:03,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:03,219 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:03,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-01 15:11:03,440 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -711133299, now seen corresponding path program 39 times [2020-12-01 15:11:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:03,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715654524] [2020-12-01 15:11:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:03,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715654524] [2020-12-01 15:11:03,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181567664] [2020-12-01 15:11:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-01 15:11:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 15:11:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:03,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:03,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-01 15:11:03,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061076254] [2020-12-01 15:11:03,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-01 15:11:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:03,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-01 15:11:03,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:11:03,843 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-12-01 15:11:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:04,748 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-12-01 15:11:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-01 15:11:04,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-01 15:11:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:04,750 INFO L225 Difference]: With dead ends: 118 [2020-12-01 15:11:04,750 INFO L226 Difference]: Without dead ends: 109 [2020-12-01 15:11:04,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-12-01 15:11:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-01 15:11:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2020-12-01 15:11:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 15:11:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-01 15:11:04,764 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 22 [2020-12-01 15:11:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:04,765 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-01 15:11:04,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-01 15:11:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-01 15:11:04,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:11:04,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:04,766 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:04,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:04,982 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1634010601, now seen corresponding path program 40 times [2020-12-01 15:11:04,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:04,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991138877] [2020-12-01 15:11:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:05,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991138877] [2020-12-01 15:11:05,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912631169] [2020-12-01 15:11:05,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:05,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:11:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:11:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:05,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-01 15:11:05,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784159939] [2020-12-01 15:11:05,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-01 15:11:05,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:05,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-01 15:11:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:11:05,363 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 19 states. [2020-12-01 15:11:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:06,138 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-12-01 15:11:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-01 15:11:06,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-01 15:11:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:06,140 INFO L225 Difference]: With dead ends: 113 [2020-12-01 15:11:06,140 INFO L226 Difference]: Without dead ends: 108 [2020-12-01 15:11:06,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-12-01 15:11:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-01 15:11:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-12-01 15:11:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-01 15:11:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-12-01 15:11:06,146 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-12-01 15:11:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:06,146 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-12-01 15:11:06,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-01 15:11:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-12-01 15:11:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:11:06,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:06,147 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:06,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-01 15:11:06,376 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash -570270300, now seen corresponding path program 41 times [2020-12-01 15:11:06,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:06,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996973590] [2020-12-01 15:11:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996973590] [2020-12-01 15:11:06,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251089787] [2020-12-01 15:11:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:06,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-01 15:11:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 15:11:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:06,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:06,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-01 15:11:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830214300] [2020-12-01 15:11:06,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:11:06,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:06,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:11:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:11:06,798 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-12-01 15:11:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:07,640 INFO L93 Difference]: Finished difference Result 103 states and 251 transitions. [2020-12-01 15:11:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-01 15:11:07,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-01 15:11:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:07,641 INFO L225 Difference]: With dead ends: 103 [2020-12-01 15:11:07,641 INFO L226 Difference]: Without dead ends: 98 [2020-12-01 15:11:07,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-12-01 15:11:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-01 15:11:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-12-01 15:11:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-01 15:11:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-12-01 15:11:07,647 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-12-01 15:11:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:07,647 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-12-01 15:11:07,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:11:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-12-01 15:11:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:11:07,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:07,648 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:07,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-01 15:11:07,872 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -885256315, now seen corresponding path program 42 times [2020-12-01 15:11:07,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:07,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894547970] [2020-12-01 15:11:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:08,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894547970] [2020-12-01 15:11:08,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641817934] [2020-12-01 15:11:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:08,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-01 15:11:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:08,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 15:11:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:08,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:08,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-01 15:11:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316885737] [2020-12-01 15:11:08,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:11:08,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:11:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:11:08,279 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 20 states. [2020-12-01 15:11:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:09,189 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-12-01 15:11:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-01 15:11:09,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-01 15:11:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:09,191 INFO L225 Difference]: With dead ends: 123 [2020-12-01 15:11:09,191 INFO L226 Difference]: Without dead ends: 114 [2020-12-01 15:11:09,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-12-01 15:11:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-01 15:11:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-12-01 15:11:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-01 15:11:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-12-01 15:11:09,197 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-12-01 15:11:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:09,197 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-12-01 15:11:09,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:11:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-12-01 15:11:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:11:09,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:09,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:09,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:09,412 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash -164539652, now seen corresponding path program 43 times [2020-12-01 15:11:09,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:09,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019975319] [2020-12-01 15:11:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:09,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019975319] [2020-12-01 15:11:09,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835235873] [2020-12-01 15:11:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:11:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:09,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:09,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-12-01 15:11:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067561020] [2020-12-01 15:11:09,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:11:09,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:09,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:11:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:11:09,834 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-12-01 15:11:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:10,365 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-12-01 15:11:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-01 15:11:10,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-01 15:11:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:10,367 INFO L225 Difference]: With dead ends: 104 [2020-12-01 15:11:10,367 INFO L226 Difference]: Without dead ends: 98 [2020-12-01 15:11:10,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-12-01 15:11:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-01 15:11:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-01 15:11:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-01 15:11:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-12-01 15:11:10,372 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-12-01 15:11:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:10,372 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-12-01 15:11:10,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:11:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-12-01 15:11:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:11:10,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:10,374 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:10,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-01 15:11:10,588 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash 967649004, now seen corresponding path program 44 times [2020-12-01 15:11:10,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:10,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761735864] [2020-12-01 15:11:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:10,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761735864] [2020-12-01 15:11:10,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174792625] [2020-12-01 15:11:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:10,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:11:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-01 15:11:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:10,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:10,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-12-01 15:11:10,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754168756] [2020-12-01 15:11:10,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:11:10,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:11:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:11:10,984 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 20 states. [2020-12-01 15:11:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:11,439 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2020-12-01 15:11:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-01 15:11:11,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-12-01 15:11:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:11,441 INFO L225 Difference]: With dead ends: 144 [2020-12-01 15:11:11,441 INFO L226 Difference]: Without dead ends: 138 [2020-12-01 15:11:11,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-12-01 15:11:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-01 15:11:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-12-01 15:11:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-01 15:11:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-12-01 15:11:11,446 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-12-01 15:11:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:11,446 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-12-01 15:11:11,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:11:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-12-01 15:11:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:11:11,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:11,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:11,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:11,673 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -498487510, now seen corresponding path program 45 times [2020-12-01 15:11:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:11,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103659472] [2020-12-01 15:11:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103659472] [2020-12-01 15:11:11,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937431856] [2020-12-01 15:11:11,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:12,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-01 15:11:12,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:12,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:11:12,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:12,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:12,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-01 15:11:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629047392] [2020-12-01 15:11:12,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-01 15:11:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-01 15:11:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:11:12,113 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-12-01 15:11:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:13,118 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-12-01 15:11:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-01 15:11:13,119 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-01 15:11:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:13,120 INFO L225 Difference]: With dead ends: 128 [2020-12-01 15:11:13,120 INFO L226 Difference]: Without dead ends: 119 [2020-12-01 15:11:13,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-12-01 15:11:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-01 15:11:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-12-01 15:11:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-01 15:11:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 163 transitions. [2020-12-01 15:11:13,125 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 163 transitions. Word has length 24 [2020-12-01 15:11:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:13,125 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 163 transitions. [2020-12-01 15:11:13,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-01 15:11:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 163 transitions. [2020-12-01 15:11:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-01 15:11:13,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:13,126 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:13,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-01 15:11:13,348 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1673116500, now seen corresponding path program 46 times [2020-12-01 15:11:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665321797] [2020-12-01 15:11:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:13,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665321797] [2020-12-01 15:11:13,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401500546] [2020-12-01 15:11:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:13,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:11:13,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-01 15:11:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:13,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:13,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:13,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-01 15:11:13,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258955520] [2020-12-01 15:11:13,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-01 15:11:13,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:13,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-01 15:11:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:11:13,740 INFO L87 Difference]: Start difference. First operand 67 states and 163 transitions. Second operand 21 states. [2020-12-01 15:11:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:14,853 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-12-01 15:11:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-01 15:11:14,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-01 15:11:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:14,855 INFO L225 Difference]: With dead ends: 123 [2020-12-01 15:11:14,855 INFO L226 Difference]: Without dead ends: 118 [2020-12-01 15:11:14,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-12-01 15:11:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-01 15:11:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-12-01 15:11:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-01 15:11:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-12-01 15:11:14,861 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-12-01 15:11:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:14,862 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-12-01 15:11:14,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-01 15:11:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-12-01 15:11:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:11:14,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:14,863 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:15,080 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1726781863, now seen corresponding path program 47 times [2020-12-01 15:11:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:15,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4398784] [2020-12-01 15:11:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:15,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4398784] [2020-12-01 15:11:15,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474776268] [2020-12-01 15:11:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:15,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-01 15:11:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:11:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:15,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:15,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:15,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-01 15:11:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134935159] [2020-12-01 15:11:15,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 15:11:15,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 15:11:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:11:15,542 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-12-01 15:11:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:16,634 INFO L93 Difference]: Finished difference Result 111 states and 271 transitions. [2020-12-01 15:11:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-01 15:11:16,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-01 15:11:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:16,635 INFO L225 Difference]: With dead ends: 111 [2020-12-01 15:11:16,635 INFO L226 Difference]: Without dead ends: 106 [2020-12-01 15:11:16,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-12-01 15:11:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-01 15:11:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2020-12-01 15:11:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-01 15:11:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-01 15:11:16,639 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-12-01 15:11:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:16,639 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-01 15:11:16,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 15:11:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-01 15:11:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-01 15:11:16,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:16,640 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:16,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-01 15:11:16,852 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -326981342, now seen corresponding path program 48 times [2020-12-01 15:11:16,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:16,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679087473] [2020-12-01 15:11:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679087473] [2020-12-01 15:11:17,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063442910] [2020-12-01 15:11:17,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:17,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-01 15:11:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 15:11:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:17,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-01 15:11:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469381591] [2020-12-01 15:11:17,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 15:11:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 15:11:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:11:17,247 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 22 states. [2020-12-01 15:11:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:18,269 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-12-01 15:11:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-01 15:11:18,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-01 15:11:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:18,271 INFO L225 Difference]: With dead ends: 133 [2020-12-01 15:11:18,271 INFO L226 Difference]: Without dead ends: 124 [2020-12-01 15:11:18,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-12-01 15:11:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-01 15:11:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-12-01 15:11:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-01 15:11:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-12-01 15:11:18,277 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-12-01 15:11:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:18,277 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-12-01 15:11:18,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 15:11:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-12-01 15:11:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:11:18,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:18,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:18,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-01 15:11:18,488 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash 791196415, now seen corresponding path program 49 times [2020-12-01 15:11:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:18,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690949952] [2020-12-01 15:11:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690949952] [2020-12-01 15:11:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002493509] [2020-12-01 15:11:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-01 15:11:18,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:18,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:18,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-01 15:11:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252346397] [2020-12-01 15:11:18,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 15:11:18,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 15:11:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:11:18,947 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-12-01 15:11:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:19,468 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-12-01 15:11:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-01 15:11:19,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-01 15:11:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:19,470 INFO L225 Difference]: With dead ends: 112 [2020-12-01 15:11:19,470 INFO L226 Difference]: Without dead ends: 106 [2020-12-01 15:11:19,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-12-01 15:11:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-01 15:11:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-12-01 15:11:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-01 15:11:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-12-01 15:11:19,473 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-12-01 15:11:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:19,474 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-12-01 15:11:19,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 15:11:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-12-01 15:11:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:11:19,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:19,475 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:19,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:19,704 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2097198353, now seen corresponding path program 50 times [2020-12-01 15:11:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:19,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091320920] [2020-12-01 15:11:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091320920] [2020-12-01 15:11:20,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438806803] [2020-12-01 15:11:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:20,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:11:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:11:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:20,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:20,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-01 15:11:20,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836054676] [2020-12-01 15:11:20,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 15:11:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 15:11:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:11:20,186 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 22 states. [2020-12-01 15:11:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:20,659 INFO L93 Difference]: Finished difference Result 156 states and 359 transitions. [2020-12-01 15:11:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-01 15:11:20,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-01 15:11:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:20,661 INFO L225 Difference]: With dead ends: 156 [2020-12-01 15:11:20,661 INFO L226 Difference]: Without dead ends: 150 [2020-12-01 15:11:20,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-12-01 15:11:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-01 15:11:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-12-01 15:11:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-01 15:11:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-12-01 15:11:20,665 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-12-01 15:11:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-12-01 15:11:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 15:11:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-12-01 15:11:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:11:20,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:20,667 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:20,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-01 15:11:20,876 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1990652807, now seen corresponding path program 51 times [2020-12-01 15:11:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:20,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794307578] [2020-12-01 15:11:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:21,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794307578] [2020-12-01 15:11:21,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140005069] [2020-12-01 15:11:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:21,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-01 15:11:21,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:21,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-01 15:11:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:21,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:21,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-01 15:11:21,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597931654] [2020-12-01 15:11:21,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-01 15:11:21,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:21,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-01 15:11:21,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-12-01 15:11:21,375 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-12-01 15:11:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:22,468 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-12-01 15:11:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-01 15:11:22,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-01 15:11:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:22,471 INFO L225 Difference]: With dead ends: 138 [2020-12-01 15:11:22,471 INFO L226 Difference]: Without dead ends: 129 [2020-12-01 15:11:22,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-12-01 15:11:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-01 15:11:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 71. [2020-12-01 15:11:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-01 15:11:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-12-01 15:11:22,475 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2020-12-01 15:11:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:22,475 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-12-01 15:11:22,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-01 15:11:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-12-01 15:11:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 15:11:22,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:22,476 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:22,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:22,677 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1546461521, now seen corresponding path program 52 times [2020-12-01 15:11:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:22,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188571140] [2020-12-01 15:11:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188571140] [2020-12-01 15:11:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537356004] [2020-12-01 15:11:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:23,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:11:23,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:11:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:23,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:23,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:23,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-01 15:11:23,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485176773] [2020-12-01 15:11:23,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-01 15:11:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-01 15:11:23,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-12-01 15:11:23,148 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2020-12-01 15:11:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:24,304 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-12-01 15:11:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-01 15:11:24,305 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-01 15:11:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:24,306 INFO L225 Difference]: With dead ends: 133 [2020-12-01 15:11:24,306 INFO L226 Difference]: Without dead ends: 128 [2020-12-01 15:11:24,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-12-01 15:11:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-01 15:11:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2020-12-01 15:11:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-01 15:11:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-12-01 15:11:24,310 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-12-01 15:11:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:24,311 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-12-01 15:11:24,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-01 15:11:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-12-01 15:11:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:11:24,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:24,312 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:24,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:24,540 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1580720362, now seen corresponding path program 53 times [2020-12-01 15:11:24,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:24,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383753766] [2020-12-01 15:11:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:24,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383753766] [2020-12-01 15:11:24,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676243899] [2020-12-01 15:11:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:24,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-01 15:11:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-01 15:11:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:24,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:24,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:24,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-01 15:11:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582972560] [2020-12-01 15:11:24,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 15:11:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 15:11:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:11:24,949 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-12-01 15:11:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,956 INFO L93 Difference]: Finished difference Result 119 states and 291 transitions. [2020-12-01 15:11:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-01 15:11:25,957 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-01 15:11:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,958 INFO L225 Difference]: With dead ends: 119 [2020-12-01 15:11:25,958 INFO L226 Difference]: Without dead ends: 114 [2020-12-01 15:11:25,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-12-01 15:11:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-01 15:11:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2020-12-01 15:11:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-01 15:11:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-12-01 15:11:25,961 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-12-01 15:11:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-12-01 15:11:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 15:11:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-12-01 15:11:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-01 15:11:25,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,963 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:26,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-01 15:11:26,176 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash -695644289, now seen corresponding path program 54 times [2020-12-01 15:11:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062003300] [2020-12-01 15:11:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:26,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062003300] [2020-12-01 15:11:26,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135470378] [2020-12-01 15:11:26,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:26,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-01 15:11:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-01 15:11:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:26,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:26,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-01 15:11:26,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254271710] [2020-12-01 15:11:26,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 15:11:26,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 15:11:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:11:26,637 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 24 states. [2020-12-01 15:11:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:27,751 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-12-01 15:11:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-01 15:11:27,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-01 15:11:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:27,753 INFO L225 Difference]: With dead ends: 143 [2020-12-01 15:11:27,753 INFO L226 Difference]: Without dead ends: 134 [2020-12-01 15:11:27,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-12-01 15:11:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-01 15:11:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2020-12-01 15:11:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-01 15:11:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-12-01 15:11:27,758 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-12-01 15:11:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:27,758 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-12-01 15:11:27,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 15:11:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-12-01 15:11:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:11:27,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:27,759 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:27,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:27,968 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:27,968 INFO L82 PathProgramCache]: Analyzing trace with hash 130555458, now seen corresponding path program 55 times [2020-12-01 15:11:27,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:27,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826220201] [2020-12-01 15:11:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:28,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826220201] [2020-12-01 15:11:28,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919550706] [2020-12-01 15:11:28,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 15:11:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:28,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:28,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-12-01 15:11:28,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731800319] [2020-12-01 15:11:28,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 15:11:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 15:11:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:11:28,541 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-12-01 15:11:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:29,144 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-12-01 15:11:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-01 15:11:29,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-01 15:11:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:29,146 INFO L225 Difference]: With dead ends: 120 [2020-12-01 15:11:29,146 INFO L226 Difference]: Without dead ends: 114 [2020-12-01 15:11:29,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-12-01 15:11:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-01 15:11:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-12-01 15:11:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-01 15:11:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-12-01 15:11:29,148 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-12-01 15:11:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:29,149 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-12-01 15:11:29,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 15:11:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-12-01 15:11:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:11:29,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:29,150 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:29,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-01 15:11:29,352 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1067943374, now seen corresponding path program 56 times [2020-12-01 15:11:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:29,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673116888] [2020-12-01 15:11:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673116888] [2020-12-01 15:11:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009415124] [2020-12-01 15:11:29,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:29,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:11:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:29,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-01 15:11:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:29,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:29,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-12-01 15:11:29,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389898694] [2020-12-01 15:11:29,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 15:11:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 15:11:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:11:29,834 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 24 states. [2020-12-01 15:11:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:30,378 INFO L93 Difference]: Finished difference Result 168 states and 387 transitions. [2020-12-01 15:11:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-01 15:11:30,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-12-01 15:11:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:30,380 INFO L225 Difference]: With dead ends: 168 [2020-12-01 15:11:30,381 INFO L226 Difference]: Without dead ends: 162 [2020-12-01 15:11:30,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-12-01 15:11:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-01 15:11:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 94. [2020-12-01 15:11:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-01 15:11:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-12-01 15:11:30,383 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-12-01 15:11:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:30,384 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-12-01 15:11:30,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 15:11:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-12-01 15:11:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:11:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:30,384 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:30,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-01 15:11:30,585 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1757713572, now seen corresponding path program 57 times [2020-12-01 15:11:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983731162] [2020-12-01 15:11:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983731162] [2020-12-01 15:11:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240181810] [2020-12-01 15:11:30,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:31,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-01 15:11:31,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:31,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 15:11:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:31,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:31,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-01 15:11:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43722378] [2020-12-01 15:11:31,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-01 15:11:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-01 15:11:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:11:31,120 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-12-01 15:11:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:32,260 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-12-01 15:11:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-01 15:11:32,261 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-01 15:11:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:32,262 INFO L225 Difference]: With dead ends: 148 [2020-12-01 15:11:32,262 INFO L226 Difference]: Without dead ends: 139 [2020-12-01 15:11:32,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-12-01 15:11:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-01 15:11:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 75. [2020-12-01 15:11:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-01 15:11:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 183 transitions. [2020-12-01 15:11:32,266 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 183 transitions. Word has length 28 [2020-12-01 15:11:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:32,266 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 183 transitions. [2020-12-01 15:11:32,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-01 15:11:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 183 transitions. [2020-12-01 15:11:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:11:32,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:32,267 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:32,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-01 15:11:32,484 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:32,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:32,484 INFO L82 PathProgramCache]: Analyzing trace with hash -90110990, now seen corresponding path program 58 times [2020-12-01 15:11:32,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:32,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273701669] [2020-12-01 15:11:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273701669] [2020-12-01 15:11:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607397310] [2020-12-01 15:11:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:32,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:11:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-01 15:11:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:32,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:11:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:32,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-01 15:11:32,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120273569] [2020-12-01 15:11:32,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-01 15:11:32,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-01 15:11:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:11:32,907 INFO L87 Difference]: Start difference. First operand 75 states and 183 transitions. Second operand 25 states. [2020-12-01 15:11:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:34,109 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-12-01 15:11:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-01 15:11:34,110 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-01 15:11:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:34,111 INFO L225 Difference]: With dead ends: 143 [2020-12-01 15:11:34,111 INFO L226 Difference]: Without dead ends: 138 [2020-12-01 15:11:34,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-12-01 15:11:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-01 15:11:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2020-12-01 15:11:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-01 15:11:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-12-01 15:11:34,114 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-12-01 15:11:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:34,115 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-12-01 15:11:34,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-01 15:11:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-12-01 15:11:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:11:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:34,115 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:34,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-01 15:11:34,316 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1345428627, now seen corresponding path program 59 times [2020-12-01 15:11:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:34,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388809305] [2020-12-01 15:11:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388809305] [2020-12-01 15:11:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75195550] [2020-12-01 15:11:34,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:34,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-01 15:11:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:11:34,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:34,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:11:34,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-12-01 15:11:34,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112667402] [2020-12-01 15:11:34,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:11:34,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:11:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:11:34,690 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-12-01 15:11:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:34,722 INFO L93 Difference]: Finished difference Result 419 states and 1009 transitions. [2020-12-01 15:11:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:11:34,722 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-01 15:11:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:34,723 INFO L225 Difference]: With dead ends: 419 [2020-12-01 15:11:34,724 INFO L226 Difference]: Without dead ends: 64 [2020-12-01 15:11:34,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:11:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-01 15:11:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-01 15:11:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-01 15:11:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 124 transitions. [2020-12-01 15:11:34,727 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 124 transitions. Word has length 29 [2020-12-01 15:11:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:34,727 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 124 transitions. [2020-12-01 15:11:34,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:11:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 124 transitions. [2020-12-01 15:11:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-01 15:11:34,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:34,728 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:34,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:34,956 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1501549212, now seen corresponding path program 60 times [2020-12-01 15:11:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:34,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697509218] [2020-12-01 15:11:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697509218] [2020-12-01 15:11:35,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538783522] [2020-12-01 15:11:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:35,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-01 15:11:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:11:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-01 15:11:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:11:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:35,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:11:35,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 36 [2020-12-01 15:11:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072912354] [2020-12-01 15:11:35,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-01 15:11:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-01 15:11:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 15:11:35,829 INFO L87 Difference]: Start difference. First operand 64 states and 124 transitions. Second operand 36 states. [2020-12-01 15:11:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:43,265 INFO L93 Difference]: Finished difference Result 232 states and 407 transitions. [2020-12-01 15:11:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2020-12-01 15:11:43,266 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 29 [2020-12-01 15:11:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:43,266 INFO L225 Difference]: With dead ends: 232 [2020-12-01 15:11:43,266 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 15:11:43,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24123 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10701, Invalid=50555, Unknown=0, NotChecked=0, Total=61256 [2020-12-01 15:11:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 15:11:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 15:11:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 15:11:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 15:11:43,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-12-01 15:11:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:43,300 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:11:43,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-01 15:11:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:11:43,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 15:11:43,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:11:43,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:11:43 BasicIcfg [2020-12-01 15:11:43,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:11:43,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:11:43,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:11:43,514 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:11:43,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:10:25" (3/4) ... [2020-12-01 15:11:43,517 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 15:11:43,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-12-01 15:11:43,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-12-01 15:11:43,528 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-01 15:11:43,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-01 15:11:43,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-01 15:11:43,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 15:11:43,575 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3215d7c2-ed8c-4cdd-a774-aa00c0289497/bin/uautomizer/witness.graphml [2020-12-01 15:11:43,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:11:43,577 INFO L168 Benchmark]: Toolchain (without parser) took 79047.90 ms. Allocated memory was 107.0 MB in the beginning and 287.3 MB in the end (delta: 180.4 MB). Free memory was 76.5 MB in the beginning and 249.1 MB in the end (delta: -172.6 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,577 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:11:43,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.31 ms. Allocated memory is still 107.0 MB. Free memory was 76.5 MB in the beginning and 65.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,578 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.79 ms. Allocated memory is still 107.0 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,579 INFO L168 Benchmark]: Boogie Preprocessor took 46.62 ms. Allocated memory is still 107.0 MB. Free memory was 63.6 MB in the beginning and 62.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,579 INFO L168 Benchmark]: RCFGBuilder took 707.90 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 42.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,580 INFO L168 Benchmark]: TraceAbstraction took 77526.34 ms. Allocated memory was 107.0 MB in the beginning and 287.3 MB in the end (delta: 180.4 MB). Free memory was 41.6 MB in the beginning and 251.9 MB in the end (delta: -210.4 MB). Peak memory consumption was 133.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,580 INFO L168 Benchmark]: Witness Printer took 61.47 ms. Allocated memory is still 287.3 MB. Free memory was 251.9 MB in the beginning and 249.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:43,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 77.6 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 654.31 ms. Allocated memory is still 107.0 MB. Free memory was 76.5 MB in the beginning and 65.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.79 ms. Allocated memory is still 107.0 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.62 ms. Allocated memory is still 107.0 MB. Free memory was 63.6 MB in the beginning and 62.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 707.90 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 42.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 77526.34 ms. Allocated memory was 107.0 MB in the beginning and 287.3 MB in the end (delta: 180.4 MB). Free memory was 41.6 MB in the beginning and 251.9 MB in the end (delta: -210.4 MB). Peak memory consumption was 133.8 MB. Max. memory is 16.1 GB. * Witness Printer took 61.47 ms. Allocated memory is still 287.3 MB. Free memory was 251.9 MB in the beginning and 249.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.8s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 60 TotalNumberOfCompositions, 1062 MoverChecksTotal - PositiveResult [Line: 693]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 77.3s, OverallIterations: 62, TraceHistogramMax: 11, AutomataDifference: 38.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 968 SDtfs, 3895 SDslu, 4452 SDs, 0 SdLazy, 6016 SolverSat, 3120 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3152 GetRequests, 1019 SyntacticMatches, 0 SemanticMatches, 2133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41989 ImplicationChecksByTransitivity, 39.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 62 MinimizatonAttempts, 1643 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 2294 NumberOfCodeBlocks, 2294 NumberOfCodeBlocksAsserted, 291 NumberOfCheckSat, 2176 ConstructedInterpolants, 0 QuantifiedInterpolants, 191762 SizeOfPredicates, 660 NumberOfNonLiveVariables, 7728 ConjunctsInSsa, 902 ConjunctsInUnsatCore, 118 InterpolantComputations, 7 PerfectInterpolantSequences, 280/4180 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...