./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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-a4ecdab [2020-11-29 19:31:56,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:31:56,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:31:56,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:31:56,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:31:56,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:31:56,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:31:56,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:31:56,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:31:56,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:31:56,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:31:56,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:31:56,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:31:56,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:31:56,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:31:56,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:31:56,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:31:56,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:31:56,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:31:56,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:31:56,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:31:56,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:31:56,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:31:56,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:31:56,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:31:56,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:31:56,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:31:56,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:31:56,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:31:56,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:31:56,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:31:56,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:31:56,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:31:56,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:31:56,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:31:56,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:31:56,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:31:56,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:31:56,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:31:56,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:31:56,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:31:56,730 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:31:56,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:31:56,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:31:56,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:31:56,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:31:56,793 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:31:56,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:31:56,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:31:56,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:31:56,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:31:56,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:31:56,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:31:56,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:31:56,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:31:56,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:31:56,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:31:56,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:31:56,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:31:56,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:31:56,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:31:56,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:31:56,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:31:56,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:31:56,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:31:56,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:31:56,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:31:56,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:31:56,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:31:56,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:31:56,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:31:56,803 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_a338a564-507a-4955-aeec-a3c474877214/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22a6d794ae7d6ac1007b3e6bed733f083c296e3e [2020-11-29 19:31:57,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:31:57,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:31:57,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:31:57,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:31:57,208 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:31:57,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-11-29 19:31:57,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/data/ff01f5c6b/f2b8e0d341594f9db89938066a1ce256/FLAGd727920ce [2020-11-29 19:31:57,999 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:31:58,000 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-11-29 19:31:58,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/data/ff01f5c6b/f2b8e0d341594f9db89938066a1ce256/FLAGd727920ce [2020-11-29 19:31:58,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/data/ff01f5c6b/f2b8e0d341594f9db89938066a1ce256 [2020-11-29 19:31:58,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:31:58,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:31:58,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:31:58,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:31:58,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:31:58,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:58,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c64b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58, skipping insertion in model container [2020-11-29 19:31:58,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:58,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:31:58,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:31:58,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:31:58,766 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:31:58,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:31:58,935 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:31:58,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58 WrapperNode [2020-11-29 19:31:58,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:31:58,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:31:58,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:31:58,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:31:58,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:58,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:58,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:31:58,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:31:58,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:31:58,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:31:59,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... [2020-11-29 19:31:59,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:31:59,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:31:59,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:31:59,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:31:59,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:31:59,159 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-29 19:31:59,159 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-29 19:31:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-29 19:31:59,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-29 19:31:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:31:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-29 19:31:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:31:59,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:31:59,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:31:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-29 19:31:59,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:31:59,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:31:59,167 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-29 19:31:59,751 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:31:59,751 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-29 19:31:59,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:59 BoogieIcfgContainer [2020-11-29 19:31:59,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:31:59,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:31:59,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:31:59,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:31:59,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:31:58" (1/3) ... [2020-11-29 19:31:59,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdbfe10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:31:59, skipping insertion in model container [2020-11-29 19:31:59,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:31:58" (2/3) ... [2020-11-29 19:31:59,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bdbfe10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:31:59, skipping insertion in model container [2020-11-29 19:31:59,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:59" (3/3) ... [2020-11-29 19:31:59,765 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-11-29 19:31:59,779 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-29 19:31:59,780 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:31:59,786 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:31:59,787 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-29 19:31:59,815 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,817 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,818 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,818 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,818 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,819 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,819 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,819 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,819 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,820 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,822 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,822 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,822 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,823 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,823 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,823 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,824 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,824 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,824 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,827 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,827 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,828 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,828 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,834 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,835 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,835 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,835 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,835 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,835 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 19:31:59,844 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-29 19:31:59,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-29 19:31:59,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:31:59,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:31:59,904 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:31:59,904 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:31:59,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:31:59,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:31:59,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:31:59,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:31:59,916 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-29 19:31:59,918 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 19:31:59,921 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 19:31:59,924 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-29 19:31:59,966 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-29 19:31:59,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-29 19:31:59,973 INFO L80 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. [2020-11-29 19:31:59,979 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-29 19:32:00,402 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-29 19:32:02,042 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-29 19:32:02,562 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-29 19:32:02,787 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 19:32:02,825 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-29 19:32:02,826 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-29 19:32:02,833 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-29 19:32:02,846 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-29 19:32:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-29 19:32:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:32:02,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:02,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:32:02,857 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-29 19:32:02,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:02,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378372204] [2020-11-29 19:32:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:03,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378372204] [2020-11-29 19:32:03,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:03,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:32:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918392352] [2020-11-29 19:32:03,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:32:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:03,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:32:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:32:03,237 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-29 19:32:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:03,337 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-29 19:32:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:32:03,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-29 19:32:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:03,356 INFO L225 Difference]: With dead ends: 75 [2020-11-29 19:32:03,357 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 19:32:03,360 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 [2020-11-29 19:32:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 19:32:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 19:32:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:32:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-29 19:32:03,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-29 19:32:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:03,425 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-29 19:32:03,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:32:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-29 19:32:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:32:03,429 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:03,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:03,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:32:03,439 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-29 19:32:03,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:03,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115929392] [2020-11-29 19:32:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:03,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115929392] [2020-11-29 19:32:03,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:03,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:32:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352669765] [2020-11-29 19:32:03,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:32:03,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:32:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:32:03,587 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-29 19:32:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:03,644 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-29 19:32:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:32:03,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 19:32:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:03,647 INFO L225 Difference]: With dead ends: 56 [2020-11-29 19:32:03,647 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:32:03,648 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 [2020-11-29 19:32:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:32:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-29 19:32:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:32:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-29 19:32:03,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-29 19:32:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:03,668 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-29 19:32:03,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:32:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-29 19:32:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:32:03,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:03,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:03,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:32:03,671 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-29 19:32:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:03,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087217197] [2020-11-29 19:32:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:03,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087217197] [2020-11-29 19:32:03,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:03,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:32:03,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136741286] [2020-11-29 19:32:03,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:32:03,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:32:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:32:03,832 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-29 19:32:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:03,953 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-29 19:32:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:32:03,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:32:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:03,955 INFO L225 Difference]: With dead ends: 54 [2020-11-29 19:32:03,955 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:32:03,955 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 [2020-11-29 19:32:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:32:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-29 19:32:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 19:32:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-29 19:32:03,963 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-29 19:32:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:03,964 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-29 19:32:03,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:32:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-29 19:32:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:32:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:03,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:03,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:32:03,966 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-29 19:32:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:03,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736302338] [2020-11-29 19:32:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736302338] [2020-11-29 19:32:04,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:04,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:32:04,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956762436] [2020-11-29 19:32:04,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:32:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:32:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:32:04,076 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-29 19:32:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:04,184 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-29 19:32:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:32:04,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:32:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:04,191 INFO L225 Difference]: With dead ends: 84 [2020-11-29 19:32:04,191 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 19:32:04,192 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 [2020-11-29 19:32:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 19:32:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-29 19:32:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 19:32:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 19:32:04,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-29 19:32:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:04,208 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 19:32:04,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:32:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 19:32:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:32:04,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:04,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:04,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:32:04,214 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-29 19:32:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:04,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453519970] [2020-11-29 19:32:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:04,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453519970] [2020-11-29 19:32:04,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:04,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:32:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287642696] [2020-11-29 19:32:04,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:32:04,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:32:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:32:04,308 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-29 19:32:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:04,406 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-29 19:32:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:32:04,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:32:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:04,408 INFO L225 Difference]: With dead ends: 61 [2020-11-29 19:32:04,408 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:32:04,408 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 [2020-11-29 19:32:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:32:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 19:32:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 19:32:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-29 19:32:04,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-29 19:32:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:04,416 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-29 19:32:04,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:32:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-29 19:32:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:32:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:04,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:04,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:32:04,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:04,421 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-29 19:32:04,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:04,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644751069] [2020-11-29 19:32:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644751069] [2020-11-29 19:32:04,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:04,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:32:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427251623] [2020-11-29 19:32:04,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:32:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:32:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:32:04,524 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-29 19:32:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:04,608 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-29 19:32:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:32:04,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:32:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:04,615 INFO L225 Difference]: With dead ends: 55 [2020-11-29 19:32:04,615 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 19:32:04,615 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 [2020-11-29 19:32:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 19:32:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 19:32:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 19:32:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-29 19:32:04,621 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-29 19:32:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:04,622 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-29 19:32:04,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:32:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-29 19:32:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:32:04,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:04,623 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:04,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:32:04,623 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-29 19:32:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:04,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234698154] [2020-11-29 19:32:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234698154] [2020-11-29 19:32:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424568482] [2020-11-29 19:32:04,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:04,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:32:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:04,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:05,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:05,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 19:32:05,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889791738] [2020-11-29 19:32:05,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:05,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:05,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:05,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:05,039 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-29 19:32:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:05,296 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-11-29 19:32:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:32:05,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 19:32:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:05,297 INFO L225 Difference]: With dead ends: 55 [2020-11-29 19:32:05,298 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:32:05,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:32:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:32:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 19:32:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 19:32:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-29 19:32:05,304 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-29 19:32:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:05,304 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-29 19:32:05,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-29 19:32:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:32:05,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:05,306 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:05,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 19:32:05,507 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-11-29 19:32:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:05,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86202928] [2020-11-29 19:32:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86202928] [2020-11-29 19:32:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512126948] [2020-11-29 19:32:05,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:05,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-29 19:32:05,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:32:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:05,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:05,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:05,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 19:32:05,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316831035] [2020-11-29 19:32:05,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:05,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:05,843 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-11-29 19:32:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:06,178 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 19:32:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:32:06,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 19:32:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:06,180 INFO L225 Difference]: With dead ends: 64 [2020-11-29 19:32:06,180 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 19:32:06,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:32:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 19:32:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-29 19:32:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 19:32:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-29 19:32:06,187 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-29 19:32:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:06,188 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-29 19:32:06,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-29 19:32:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:32:06,189 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:06,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:06,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:06,411 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-11-29 19:32:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:06,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016720445] [2020-11-29 19:32:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:06,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016720445] [2020-11-29 19:32:06,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152671617] [2020-11-29 19:32:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:32:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:06,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:06,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:06,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 19:32:06,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822945856] [2020-11-29 19:32:06,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:06,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:06,700 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-29 19:32:06,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:06,883 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-29 19:32:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:32:06,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 19:32:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:06,885 INFO L225 Difference]: With dead ends: 56 [2020-11-29 19:32:06,885 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:32:06,886 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 [2020-11-29 19:32:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:32:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-29 19:32:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 19:32:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 19:32:06,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 19:32:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:06,891 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 19:32:06,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 19:32:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:32:06,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:06,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:07,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:07,113 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-11-29 19:32:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:07,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913690716] [2020-11-29 19:32:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:07,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913690716] [2020-11-29 19:32:07,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128471985] [2020-11-29 19:32:07,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:07,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:07,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:32:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:07,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:07,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 19:32:07,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167520192] [2020-11-29 19:32:07,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:07,404 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-11-29 19:32:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:07,561 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-11-29 19:32:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:32:07,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 19:32:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:07,563 INFO L225 Difference]: With dead ends: 72 [2020-11-29 19:32:07,564 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 19:32:07,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:32:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 19:32:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-29 19:32:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 19:32:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 19:32:07,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 19:32:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:07,570 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 19:32:07,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 19:32:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:32:07,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:07,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:07,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:07,801 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-11-29 19:32:07,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:07,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495624921] [2020-11-29 19:32:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:07,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495624921] [2020-11-29 19:32:07,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159099584] [2020-11-29 19:32:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:07,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 19:32:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:32:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:08,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:32:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429391350] [2020-11-29 19:32:08,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:32:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:32:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:32:08,042 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-29 19:32:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:08,241 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-11-29 19:32:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:32:08,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 19:32:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:08,243 INFO L225 Difference]: With dead ends: 68 [2020-11-29 19:32:08,243 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 19:32:08,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:32:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 19:32:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-11-29 19:32:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 19:32:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-11-29 19:32:08,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-11-29 19:32:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:08,250 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-11-29 19:32:08,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:32:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-11-29 19:32:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:32:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:08,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:08,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 19:32:08,461 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-11-29 19:32:08,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:08,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404064595] [2020-11-29 19:32:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404064595] [2020-11-29 19:32:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774131163] [2020-11-29 19:32:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:08,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:32:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:08,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:08,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:32:08,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871518462] [2020-11-29 19:32:08,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:32:08,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:32:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:32:08,684 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-11-29 19:32:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:08,883 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-29 19:32:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:32:08,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 19:32:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:08,884 INFO L225 Difference]: With dead ends: 63 [2020-11-29 19:32:08,884 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 19:32:08,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 19:32:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-29 19:32:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 19:32:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 19:32:08,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-29 19:32:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:08,892 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 19:32:08,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:32:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 19:32:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:32:08,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:08,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:09,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:09,109 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:09,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-11-29 19:32:09,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:09,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789975759] [2020-11-29 19:32:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:09,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789975759] [2020-11-29 19:32:09,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430995322] [2020-11-29 19:32:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:09,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-29 19:32:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:32:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:09,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:09,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:09,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:32:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830312886] [2020-11-29 19:32:09,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:32:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:32:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:32:09,327 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-29 19:32:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:09,596 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-11-29 19:32:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:32:09,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 19:32:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:09,598 INFO L225 Difference]: With dead ends: 63 [2020-11-29 19:32:09,598 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 19:32:09,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:32:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 19:32:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-11-29 19:32:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:32:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-11-29 19:32:09,603 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-11-29 19:32:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:09,603 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-11-29 19:32:09,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:32:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-11-29 19:32:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:32:09,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:09,605 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:09,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:09,817 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-11-29 19:32:09,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:09,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797958161] [2020-11-29 19:32:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:09,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797958161] [2020-11-29 19:32:09,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053942810] [2020-11-29 19:32:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:09,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 19:32:09,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:32:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:10,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:10,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:10,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:32:10,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907930900] [2020-11-29 19:32:10,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:32:10,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:10,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:32:10,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:32:10,032 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-11-29 19:32:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:10,396 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 19:32:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 19:32:10,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 19:32:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:10,398 INFO L225 Difference]: With dead ends: 73 [2020-11-29 19:32:10,398 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 19:32:10,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:32:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 19:32:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-11-29 19:32:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 19:32:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-29 19:32:10,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-29 19:32:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:10,405 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-29 19:32:10,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:32:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-29 19:32:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:32:10,406 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:10,406 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:10,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:32:10,618 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-11-29 19:32:10,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:10,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714022511] [2020-11-29 19:32:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:10,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714022511] [2020-11-29 19:32:10,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66966370] [2020-11-29 19:32:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:32:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:10,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:10,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:10,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 19:32:10,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756959374] [2020-11-29 19:32:10,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:32:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:32:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:32:10,910 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-29 19:32:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:11,107 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 19:32:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:32:11,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 19:32:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:11,109 INFO L225 Difference]: With dead ends: 64 [2020-11-29 19:32:11,109 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 19:32:11,110 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 [2020-11-29 19:32:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 19:32:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-29 19:32:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:32:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 19:32:11,114 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 19:32:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:11,114 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 19:32:11,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:32:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 19:32:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:32:11,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:11,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 19:32:11,345 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-11-29 19:32:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:11,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064482413] [2020-11-29 19:32:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:11,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064482413] [2020-11-29 19:32:11,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125089327] [2020-11-29 19:32:11,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:11,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:11,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:11,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:32:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:11,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:11,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 19:32:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670492762] [2020-11-29 19:32:11,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:32:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:32:11,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:32:11,566 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-11-29 19:32:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:11,786 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-11-29 19:32:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:32:11,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 19:32:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:11,788 INFO L225 Difference]: With dead ends: 84 [2020-11-29 19:32:11,788 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 19:32:11,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:32:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 19:32:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-11-29 19:32:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:32:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 19:32:11,793 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 19:32:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:11,793 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 19:32:11,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:32:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 19:32:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:32:11,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:11,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:11,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 19:32:11,995 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-11-29 19:32:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:11,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109011249] [2020-11-29 19:32:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:12,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109011249] [2020-11-29 19:32:12,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856149534] [2020-11-29 19:32:12,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:12,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 19:32:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:32:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:12,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:12,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 19:32:12,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290356538] [2020-11-29 19:32:12,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:32:12,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:32:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:32:12,197 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-29 19:32:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:12,494 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-11-29 19:32:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 19:32:12,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 19:32:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:12,495 INFO L225 Difference]: With dead ends: 78 [2020-11-29 19:32:12,495 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 19:32:12,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:32:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 19:32:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-11-29 19:32:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 19:32:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-29 19:32:12,500 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-11-29 19:32:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:12,501 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-29 19:32:12,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:32:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-29 19:32:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:32:12,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:12,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:12,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:32:12,713 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-11-29 19:32:12,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:12,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16085892] [2020-11-29 19:32:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:12,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16085892] [2020-11-29 19:32:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439414110] [2020-11-29 19:32:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:12,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:12,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:32:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:12,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:12,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:12,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 19:32:12,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640580261] [2020-11-29 19:32:12,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:32:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:32:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:32:12,978 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-11-29 19:32:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:13,285 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 19:32:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:32:13,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 19:32:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:13,286 INFO L225 Difference]: With dead ends: 73 [2020-11-29 19:32:13,286 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 19:32:13,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 19:32:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-11-29 19:32:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 19:32:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-29 19:32:13,291 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-29 19:32:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:13,291 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-29 19:32:13,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:32:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-29 19:32:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:32:13,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:13,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:13,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:32:13,493 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-11-29 19:32:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:13,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544576661] [2020-11-29 19:32:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:13,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544576661] [2020-11-29 19:32:13,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274066214] [2020-11-29 19:32:13,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:13,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 19:32:13,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:32:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:13,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:13,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:32:13,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059512377] [2020-11-29 19:32:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:32:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:32:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:32:13,817 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-29 19:32:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:14,140 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-11-29 19:32:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:32:14,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 19:32:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:14,141 INFO L225 Difference]: With dead ends: 71 [2020-11-29 19:32:14,141 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 19:32:14,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:32:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 19:32:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-11-29 19:32:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 19:32:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-29 19:32:14,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-11-29 19:32:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:14,146 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-29 19:32:14,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:32:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-29 19:32:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:32:14,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:14,147 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:14,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:14,357 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-11-29 19:32:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:14,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605892971] [2020-11-29 19:32:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:14,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605892971] [2020-11-29 19:32:14,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594660066] [2020-11-29 19:32:14,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:14,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 19:32:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:32:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:14,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:14,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:32:14,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524408149] [2020-11-29 19:32:14,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:32:14,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:32:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:32:14,617 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-11-29 19:32:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:15,007 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 19:32:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:32:15,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 19:32:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:15,012 INFO L225 Difference]: With dead ends: 83 [2020-11-29 19:32:15,012 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:32:15,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-29 19:32:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:32:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-11-29 19:32:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 19:32:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-29 19:32:15,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-29 19:32:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:15,026 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-29 19:32:15,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:32:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-29 19:32:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:32:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:15,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:15,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:15,237 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-11-29 19:32:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:15,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175545191] [2020-11-29 19:32:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:15,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175545191] [2020-11-29 19:32:15,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380848455] [2020-11-29 19:32:15,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:32:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:15,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:15,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:15,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 19:32:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412089473] [2020-11-29 19:32:15,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:32:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:32:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:32:15,528 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-29 19:32:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:15,758 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-29 19:32:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:32:15,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 19:32:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:15,760 INFO L225 Difference]: With dead ends: 72 [2020-11-29 19:32:15,760 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 19:32:15,760 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 [2020-11-29 19:32:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 19:32:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-29 19:32:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 19:32:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 19:32:15,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 19:32:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:15,764 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 19:32:15,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:32:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 19:32:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:32:15,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:15,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:15,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 19:32:15,966 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-11-29 19:32:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768519763] [2020-11-29 19:32:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:16,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768519763] [2020-11-29 19:32:16,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894669929] [2020-11-29 19:32:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:16,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:32:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:16,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:16,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 19:32:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069873730] [2020-11-29 19:32:16,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:32:16,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:16,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:32:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:32:16,240 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-11-29 19:32:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:16,465 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-11-29 19:32:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:32:16,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 19:32:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:16,467 INFO L225 Difference]: With dead ends: 96 [2020-11-29 19:32:16,467 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 19:32:16,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:32:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 19:32:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-11-29 19:32:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 19:32:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 19:32:16,472 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 19:32:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:16,474 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 19:32:16,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:32:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 19:32:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:32:16,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:16,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:16,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:16,693 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-11-29 19:32:16,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:16,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197909652] [2020-11-29 19:32:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197909652] [2020-11-29 19:32:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010557183] [2020-11-29 19:32:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:16,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 19:32:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:32:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:16,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:16,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 19:32:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459052803] [2020-11-29 19:32:16,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:32:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:32:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:32:16,943 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-29 19:32:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:17,354 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-11-29 19:32:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:32:17,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 19:32:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:17,356 INFO L225 Difference]: With dead ends: 88 [2020-11-29 19:32:17,356 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 19:32:17,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-29 19:32:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 19:32:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-11-29 19:32:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 19:32:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-11-29 19:32:17,359 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-11-29 19:32:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:17,359 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-11-29 19:32:17,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:32:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-11-29 19:32:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:32:17,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:17,360 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:17,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 19:32:17,561 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-11-29 19:32:17,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:17,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578856757] [2020-11-29 19:32:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578856757] [2020-11-29 19:32:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544650833] [2020-11-29 19:32:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:17,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:32:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:17,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:17,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:17,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 19:32:17,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682373742] [2020-11-29 19:32:17,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:32:17,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:32:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:32:17,883 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-11-29 19:32:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:18,333 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 19:32:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:32:18,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 19:32:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:18,335 INFO L225 Difference]: With dead ends: 83 [2020-11-29 19:32:18,335 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 19:32:18,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:32:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 19:32:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-11-29 19:32:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 19:32:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-29 19:32:18,339 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-29 19:32:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:18,339 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-29 19:32:18,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:32:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-29 19:32:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:32:18,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:18,340 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:18,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 19:32:18,553 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-11-29 19:32:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:18,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971705529] [2020-11-29 19:32:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971705529] [2020-11-29 19:32:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119696058] [2020-11-29 19:32:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:18,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 19:32:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:32:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:18,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:18,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:18,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 19:32:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703800872] [2020-11-29 19:32:18,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:32:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:32:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:32:18,857 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-29 19:32:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:19,342 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-11-29 19:32:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:32:19,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 19:32:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:19,344 INFO L225 Difference]: With dead ends: 79 [2020-11-29 19:32:19,344 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:32:19,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-29 19:32:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:32:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-11-29 19:32:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:32:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 19:32:19,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-11-29 19:32:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:19,354 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 19:32:19,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:32:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 19:32:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:32:19,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:19,358 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:19,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 19:32:19,577 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-11-29 19:32:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:19,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26216327] [2020-11-29 19:32:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:19,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26216327] [2020-11-29 19:32:19,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641538064] [2020-11-29 19:32:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:19,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 19:32:19,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:19,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:32:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:19,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:19,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:19,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 19:32:19,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485579907] [2020-11-29 19:32:19,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:32:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:32:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:32:19,854 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-11-29 19:32:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:20,428 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 19:32:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 19:32:20,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 19:32:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:20,430 INFO L225 Difference]: With dead ends: 93 [2020-11-29 19:32:20,430 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 19:32:20,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:32:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 19:32:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-11-29 19:32:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 19:32:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-29 19:32:20,436 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-29 19:32:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:20,436 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-29 19:32:20,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:32:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-29 19:32:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:32:20,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:20,437 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:20,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 19:32:20,657 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-11-29 19:32:20,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:20,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427150813] [2020-11-29 19:32:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427150813] [2020-11-29 19:32:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765316002] [2020-11-29 19:32:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:20,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:32:20,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:20,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:20,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:20,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 19:32:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997713382] [2020-11-29 19:32:20,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:32:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:32:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:32:20,966 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-29 19:32:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:21,228 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-29 19:32:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 19:32:21,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 19:32:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:21,229 INFO L225 Difference]: With dead ends: 80 [2020-11-29 19:32:21,229 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:32:21,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:32:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:32:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-29 19:32:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 19:32:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 19:32:21,233 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 19:32:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:21,234 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 19:32:21,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:32:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 19:32:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:32:21,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:21,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:21,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 19:32:21,449 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:21,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1673993827, now seen corresponding path program 26 times [2020-11-29 19:32:21,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:21,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911066876] [2020-11-29 19:32:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:21,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911066876] [2020-11-29 19:32:21,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599075400] [2020-11-29 19:32:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:21,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:21,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:32:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:21,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:21,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 19:32:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003312831] [2020-11-29 19:32:21,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:32:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:32:21,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:32:21,745 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 14 states. [2020-11-29 19:32:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:21,992 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-11-29 19:32:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:32:22,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 19:32:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:22,002 INFO L225 Difference]: With dead ends: 108 [2020-11-29 19:32:22,002 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 19:32:22,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:32:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 19:32:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2020-11-29 19:32:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 19:32:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 19:32:22,006 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 19:32:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:22,007 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 19:32:22,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:32:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 19:32:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:32:22,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:22,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:22,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:22,225 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1248727405, now seen corresponding path program 27 times [2020-11-29 19:32:22,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:22,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856453498] [2020-11-29 19:32:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:22,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856453498] [2020-11-29 19:32:22,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432455027] [2020-11-29 19:32:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:22,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 19:32:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:32:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:22,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:22,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 19:32:22,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938270400] [2020-11-29 19:32:22,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:32:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:32:22,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:32:22,485 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-29 19:32:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:22,955 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-11-29 19:32:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 19:32:22,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 19:32:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:22,959 INFO L225 Difference]: With dead ends: 98 [2020-11-29 19:32:22,959 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 19:32:22,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 19:32:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 19:32:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-11-29 19:32:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 19:32:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 133 transitions. [2020-11-29 19:32:22,964 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 133 transitions. Word has length 18 [2020-11-29 19:32:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:22,964 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 133 transitions. [2020-11-29 19:32:22,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:32:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 133 transitions. [2020-11-29 19:32:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:32:22,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:22,965 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:23,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 19:32:23,166 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:23,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1968167459, now seen corresponding path program 28 times [2020-11-29 19:32:23,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:23,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775680399] [2020-11-29 19:32:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:23,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775680399] [2020-11-29 19:32:23,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631967253] [2020-11-29 19:32:23,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:23,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:23,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:32:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:23,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:23,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:23,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 19:32:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615532012] [2020-11-29 19:32:23,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:32:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:32:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:32:23,582 INFO L87 Difference]: Start difference. First operand 55 states and 133 transitions. Second operand 15 states. [2020-11-29 19:32:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:24,028 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 19:32:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 19:32:24,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 19:32:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:24,029 INFO L225 Difference]: With dead ends: 93 [2020-11-29 19:32:24,029 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 19:32:24,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:32:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 19:32:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-11-29 19:32:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 19:32:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-29 19:32:24,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-29 19:32:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:24,034 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-29 19:32:24,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:32:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-29 19:32:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:32:24,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:24,035 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:24,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:24,245 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash -55818402, now seen corresponding path program 29 times [2020-11-29 19:32:24,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:24,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464234976] [2020-11-29 19:32:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:24,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464234976] [2020-11-29 19:32:24,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286801552] [2020-11-29 19:32:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:24,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 19:32:24,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:32:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:24,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:24,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:24,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 19:32:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337319507] [2020-11-29 19:32:24,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:32:24,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:32:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:32:24,553 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-29 19:32:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:25,099 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-11-29 19:32:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 19:32:25,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 19:32:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:25,101 INFO L225 Difference]: With dead ends: 87 [2020-11-29 19:32:25,101 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 19:32:25,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:32:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 19:32:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-11-29 19:32:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 19:32:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-11-29 19:32:25,105 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-11-29 19:32:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:25,105 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-11-29 19:32:25,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:32:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-11-29 19:32:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:32:25,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:25,105 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:25,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 19:32:25,317 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 883671691, now seen corresponding path program 30 times [2020-11-29 19:32:25,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:25,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765463150] [2020-11-29 19:32:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:25,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765463150] [2020-11-29 19:32:25,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644177341] [2020-11-29 19:32:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:25,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-29 19:32:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:32:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:25,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:25,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:25,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 19:32:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122740815] [2020-11-29 19:32:25,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:32:25,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:32:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:32:25,650 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 16 states. [2020-11-29 19:32:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:26,245 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 19:32:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 19:32:26,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 19:32:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:26,247 INFO L225 Difference]: With dead ends: 103 [2020-11-29 19:32:26,247 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 19:32:26,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 19:32:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 19:32:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-11-29 19:32:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 19:32:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-29 19:32:26,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-29 19:32:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:26,252 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-29 19:32:26,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:32:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-29 19:32:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:32:26,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:26,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:26,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:26,469 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1335227574, now seen corresponding path program 31 times [2020-11-29 19:32:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:26,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138220004] [2020-11-29 19:32:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:26,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138220004] [2020-11-29 19:32:26,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52895819] [2020-11-29 19:32:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:32:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:26,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:26,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:26,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 19:32:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966642269] [2020-11-29 19:32:26,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:32:26,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:32:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:32:26,794 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-29 19:32:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:27,078 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-29 19:32:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 19:32:27,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 19:32:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:27,079 INFO L225 Difference]: With dead ends: 88 [2020-11-29 19:32:27,079 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 19:32:27,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-29 19:32:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 19:32:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-29 19:32:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 19:32:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 19:32:27,083 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 19:32:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:27,084 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 19:32:27,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:32:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 19:32:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:32:27,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:27,085 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:27,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 19:32:27,285 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1904656218, now seen corresponding path program 32 times [2020-11-29 19:32:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105340444] [2020-11-29 19:32:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:27,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105340444] [2020-11-29 19:32:27,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243460760] [2020-11-29 19:32:27,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:27,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:27,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:27,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 19:32:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:27,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:27,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 19:32:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361347091] [2020-11-29 19:32:27,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:32:27,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:32:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:32:27,567 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-11-29 19:32:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:27,871 INFO L93 Difference]: Finished difference Result 120 states and 275 transitions. [2020-11-29 19:32:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:32:27,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 19:32:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:27,873 INFO L225 Difference]: With dead ends: 120 [2020-11-29 19:32:27,873 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 19:32:27,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-11-29 19:32:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 19:32:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-11-29 19:32:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 19:32:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 19:32:27,878 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 19:32:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:27,878 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 19:32:27,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:32:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 19:32:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:32:27,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:27,879 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:28,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:28,089 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1730347856, now seen corresponding path program 33 times [2020-11-29 19:32:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:28,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773878328] [2020-11-29 19:32:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773878328] [2020-11-29 19:32:28,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917252890] [2020-11-29 19:32:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:28,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 19:32:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:32:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:28,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:28,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 19:32:28,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684147357] [2020-11-29 19:32:28,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:32:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:32:28,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:32:28,374 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-29 19:32:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:29,040 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-11-29 19:32:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 19:32:29,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 19:32:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:29,042 INFO L225 Difference]: With dead ends: 108 [2020-11-29 19:32:29,042 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 19:32:29,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 19:32:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 19:32:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-11-29 19:32:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 19:32:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 143 transitions. [2020-11-29 19:32:29,046 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 143 transitions. Word has length 20 [2020-11-29 19:32:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:29,047 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 143 transitions. [2020-11-29 19:32:29,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:32:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 143 transitions. [2020-11-29 19:32:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:32:29,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:29,047 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:29,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 19:32:29,248 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1624044134, now seen corresponding path program 34 times [2020-11-29 19:32:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:29,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749170991] [2020-11-29 19:32:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:29,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749170991] [2020-11-29 19:32:29,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470231507] [2020-11-29 19:32:29,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:29,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:29,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:29,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 19:32:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:29,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:29,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:29,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 19:32:29,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098305635] [2020-11-29 19:32:29,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:32:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:32:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:32:29,561 INFO L87 Difference]: Start difference. First operand 59 states and 143 transitions. Second operand 17 states. [2020-11-29 19:32:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:30,227 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 19:32:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 19:32:30,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 19:32:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:30,229 INFO L225 Difference]: With dead ends: 103 [2020-11-29 19:32:30,229 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 19:32:30,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 19:32:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 19:32:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-11-29 19:32:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 19:32:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-29 19:32:30,233 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-29 19:32:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:30,233 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-29 19:32:30,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:32:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-29 19:32:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:32:30,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:30,234 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:30,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:30,435 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:30,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2101150495, now seen corresponding path program 35 times [2020-11-29 19:32:30,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:30,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207759189] [2020-11-29 19:32:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:30,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207759189] [2020-11-29 19:32:30,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707996140] [2020-11-29 19:32:30,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:30,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 19:32:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:32:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:30,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:30,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 19:32:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550869734] [2020-11-29 19:32:30,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:30,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:30,800 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-29 19:32:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:31,511 INFO L93 Difference]: Finished difference Result 95 states and 231 transitions. [2020-11-29 19:32:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 19:32:31,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 19:32:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:31,512 INFO L225 Difference]: With dead ends: 95 [2020-11-29 19:32:31,512 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 19:32:31,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 19:32:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 19:32:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-11-29 19:32:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 19:32:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-11-29 19:32:31,517 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-11-29 19:32:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:31,517 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-11-29 19:32:31,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-11-29 19:32:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:32:31,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:31,518 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:31,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 19:32:31,719 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1194216792, now seen corresponding path program 36 times [2020-11-29 19:32:31,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:31,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564722360] [2020-11-29 19:32:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:31,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564722360] [2020-11-29 19:32:31,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895766796] [2020-11-29 19:32:31,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:31,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 19:32:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:32:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:31,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:32,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:32,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 19:32:32,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530244578] [2020-11-29 19:32:32,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:32,007 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 18 states. [2020-11-29 19:32:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:32,740 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 19:32:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 19:32:32,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 19:32:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:32,742 INFO L225 Difference]: With dead ends: 113 [2020-11-29 19:32:32,742 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 19:32:32,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:32:32,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 19:32:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-11-29 19:32:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 19:32:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-29 19:32:32,747 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-29 19:32:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:32,747 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-29 19:32:32,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-29 19:32:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:32:32,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:32,748 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:32,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 19:32:32,961 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1041510855, now seen corresponding path program 37 times [2020-11-29 19:32:32,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:32,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520782370] [2020-11-29 19:32:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520782370] [2020-11-29 19:32:33,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922876708] [2020-11-29 19:32:33,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:33,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:32:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:33,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:33,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:33,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 19:32:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542875273] [2020-11-29 19:32:33,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:33,341 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-29 19:32:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:33,706 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-29 19:32:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:32:33,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 19:32:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:33,708 INFO L225 Difference]: With dead ends: 96 [2020-11-29 19:32:33,708 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 19:32:33,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:32:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 19:32:33,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-29 19:32:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 19:32:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 19:32:33,712 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 19:32:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:33,712 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 19:32:33,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 19:32:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:32:33,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:33,713 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:33,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 19:32:33,921 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash -718545367, now seen corresponding path program 38 times [2020-11-29 19:32:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:33,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932519660] [2020-11-29 19:32:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:34,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932519660] [2020-11-29 19:32:34,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251255301] [2020-11-29 19:32:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:34,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 19:32:34,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:34,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:34,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 19:32:34,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726562579] [2020-11-29 19:32:34,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:34,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:34,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:34,321 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 18 states. [2020-11-29 19:32:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:34,709 INFO L93 Difference]: Finished difference Result 132 states and 303 transitions. [2020-11-29 19:32:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:32:34,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 19:32:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:34,711 INFO L225 Difference]: With dead ends: 132 [2020-11-29 19:32:34,711 INFO L226 Difference]: Without dead ends: 126 [2020-11-29 19:32:34,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 19:32:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-29 19:32:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 76. [2020-11-29 19:32:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 19:32:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 19:32:34,716 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 19:32:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:34,716 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 19:32:34,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 19:32:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:32:34,718 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:34,719 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:34,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 19:32:34,929 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash -711133299, now seen corresponding path program 39 times [2020-11-29 19:32:34,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:34,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308977555] [2020-11-29 19:32:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308977555] [2020-11-29 19:32:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957359238] [2020-11-29 19:32:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:35,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 19:32:35,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 19:32:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:35,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:35,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 19:32:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255213679] [2020-11-29 19:32:35,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 19:32:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 19:32:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:32:35,297 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-29 19:32:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:36,241 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-11-29 19:32:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 19:32:36,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 19:32:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:36,243 INFO L225 Difference]: With dead ends: 118 [2020-11-29 19:32:36,243 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 19:32:36,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 19:32:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 19:32:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2020-11-29 19:32:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 19:32:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-11-29 19:32:36,248 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 22 [2020-11-29 19:32:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:36,248 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-11-29 19:32:36,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 19:32:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-11-29 19:32:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:32:36,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:36,249 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:36,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:36,449 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1634010601, now seen corresponding path program 40 times [2020-11-29 19:32:36,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:36,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656579670] [2020-11-29 19:32:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:36,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656579670] [2020-11-29 19:32:36,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996849186] [2020-11-29 19:32:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:36,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:36,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 19:32:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:36,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:36,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 19:32:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980155324] [2020-11-29 19:32:36,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 19:32:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 19:32:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:32:36,797 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 19 states. [2020-11-29 19:32:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:37,693 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 19:32:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 19:32:37,694 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 19:32:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:37,695 INFO L225 Difference]: With dead ends: 113 [2020-11-29 19:32:37,695 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 19:32:37,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 19:32:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 19:32:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-11-29 19:32:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 19:32:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-29 19:32:37,700 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-29 19:32:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:37,701 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-29 19:32:37,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 19:32:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-29 19:32:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:32:37,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:37,701 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:37,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-29 19:32:37,902 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash -570270300, now seen corresponding path program 41 times [2020-11-29 19:32:37,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:37,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062742749] [2020-11-29 19:32:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:38,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062742749] [2020-11-29 19:32:38,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192522581] [2020-11-29 19:32:38,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:38,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 19:32:38,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:38,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:32:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:38,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:38,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:38,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 19:32:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724299471] [2020-11-29 19:32:38,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:32:38,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:32:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:32:38,267 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-29 19:32:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:39,034 INFO L93 Difference]: Finished difference Result 103 states and 251 transitions. [2020-11-29 19:32:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 19:32:39,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 19:32:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:39,035 INFO L225 Difference]: With dead ends: 103 [2020-11-29 19:32:39,035 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 19:32:39,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 19:32:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 19:32:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-11-29 19:32:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 19:32:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-11-29 19:32:39,040 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-11-29 19:32:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:39,040 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-11-29 19:32:39,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:32:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-11-29 19:32:39,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:32:39,041 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:39,041 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:39,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 19:32:39,253 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -885256315, now seen corresponding path program 42 times [2020-11-29 19:32:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:39,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431184150] [2020-11-29 19:32:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:39,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431184150] [2020-11-29 19:32:39,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712863357] [2020-11-29 19:32:39,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:39,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-29 19:32:39,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:32:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:39,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:39,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:39,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 19:32:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540053323] [2020-11-29 19:32:39,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:32:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:32:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:32:39,622 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 20 states. [2020-11-29 19:32:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:40,474 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 19:32:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 19:32:40,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 19:32:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:40,480 INFO L225 Difference]: With dead ends: 123 [2020-11-29 19:32:40,480 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 19:32:40,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 19:32:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 19:32:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-11-29 19:32:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 19:32:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-29 19:32:40,486 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-29 19:32:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:40,486 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-29 19:32:40,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:32:40,486 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-29 19:32:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:32:40,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:40,487 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:40,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:40,697 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -164539652, now seen corresponding path program 43 times [2020-11-29 19:32:40,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:40,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886289501] [2020-11-29 19:32:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886289501] [2020-11-29 19:32:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730977905] [2020-11-29 19:32:40,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:32:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:41,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:41,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:41,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 19:32:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092049968] [2020-11-29 19:32:41,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:32:41,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:32:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:32:41,067 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-29 19:32:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:41,529 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-29 19:32:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 19:32:41,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 19:32:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:41,531 INFO L225 Difference]: With dead ends: 104 [2020-11-29 19:32:41,531 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 19:32:41,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:32:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 19:32:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-29 19:32:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 19:32:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 19:32:41,535 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 19:32:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:41,535 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 19:32:41,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:32:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 19:32:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:32:41,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:41,536 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:41,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 19:32:41,745 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 967649004, now seen corresponding path program 44 times [2020-11-29 19:32:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367402841] [2020-11-29 19:32:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:42,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367402841] [2020-11-29 19:32:42,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766184982] [2020-11-29 19:32:42,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:42,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:32:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:42,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:42,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 19:32:42,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797295761] [2020-11-29 19:32:42,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:32:42,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:42,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:32:42,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:32:42,139 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 20 states. [2020-11-29 19:32:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:42,636 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2020-11-29 19:32:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:32:42,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 19:32:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:42,639 INFO L225 Difference]: With dead ends: 144 [2020-11-29 19:32:42,639 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 19:32:42,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 19:32:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 19:32:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-11-29 19:32:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 19:32:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 19:32:42,644 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 19:32:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:42,644 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 19:32:42,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:32:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 19:32:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:32:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:42,646 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:42,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:42,857 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -498487510, now seen corresponding path program 45 times [2020-11-29 19:32:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:42,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051329956] [2020-11-29 19:32:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:43,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051329956] [2020-11-29 19:32:43,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716447725] [2020-11-29 19:32:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:43,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-29 19:32:43,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:32:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:43,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:43,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:43,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 19:32:43,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099332360] [2020-11-29 19:32:43,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:32:43,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:43,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:32:43,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:32:43,226 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-29 19:32:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:44,146 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-11-29 19:32:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 19:32:44,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 19:32:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:44,148 INFO L225 Difference]: With dead ends: 128 [2020-11-29 19:32:44,148 INFO L226 Difference]: Without dead ends: 119 [2020-11-29 19:32:44,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 19:32:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-29 19:32:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-11-29 19:32:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 19:32:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 163 transitions. [2020-11-29 19:32:44,153 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 163 transitions. Word has length 24 [2020-11-29 19:32:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:44,153 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 163 transitions. [2020-11-29 19:32:44,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:32:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 163 transitions. [2020-11-29 19:32:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:32:44,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:44,154 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:44,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 19:32:44,363 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1673116500, now seen corresponding path program 46 times [2020-11-29 19:32:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:44,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435866640] [2020-11-29 19:32:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:44,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435866640] [2020-11-29 19:32:44,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980851044] [2020-11-29 19:32:44,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:44,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:32:44,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:44,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:44,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:44,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 19:32:44,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677738725] [2020-11-29 19:32:44,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:32:44,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:44,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:32:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:32:44,758 INFO L87 Difference]: Start difference. First operand 67 states and 163 transitions. Second operand 21 states. [2020-11-29 19:32:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:45,621 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 19:32:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 19:32:45,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 19:32:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:45,623 INFO L225 Difference]: With dead ends: 123 [2020-11-29 19:32:45,623 INFO L226 Difference]: Without dead ends: 118 [2020-11-29 19:32:45,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 19:32:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-29 19:32:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-11-29 19:32:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 19:32:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-29 19:32:45,629 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-29 19:32:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:45,629 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-29 19:32:45,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:32:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-29 19:32:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:32:45,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:45,630 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:45,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:45,849 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1726781863, now seen corresponding path program 47 times [2020-11-29 19:32:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:45,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605140191] [2020-11-29 19:32:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605140191] [2020-11-29 19:32:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071683906] [2020-11-29 19:32:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:46,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 19:32:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:32:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:46,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:46,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:46,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 19:32:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883923189] [2020-11-29 19:32:46,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:32:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:32:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:32:46,255 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-29 19:32:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:47,270 INFO L93 Difference]: Finished difference Result 111 states and 271 transitions. [2020-11-29 19:32:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 19:32:47,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 19:32:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:47,271 INFO L225 Difference]: With dead ends: 111 [2020-11-29 19:32:47,271 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 19:32:47,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 19:32:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 19:32:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2020-11-29 19:32:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 19:32:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-11-29 19:32:47,276 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-11-29 19:32:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:47,276 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-11-29 19:32:47,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:32:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-11-29 19:32:47,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:32:47,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:47,277 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:47,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-29 19:32:47,478 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -326981342, now seen corresponding path program 48 times [2020-11-29 19:32:47,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:47,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976461751] [2020-11-29 19:32:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:47,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976461751] [2020-11-29 19:32:47,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258879974] [2020-11-29 19:32:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:47,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 19:32:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:32:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:47,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:47,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:47,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 19:32:47,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743316729] [2020-11-29 19:32:47,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:32:47,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:32:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:32:47,857 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 22 states. [2020-11-29 19:32:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:48,853 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 19:32:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 19:32:48,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 19:32:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:48,854 INFO L225 Difference]: With dead ends: 133 [2020-11-29 19:32:48,854 INFO L226 Difference]: Without dead ends: 124 [2020-11-29 19:32:48,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 19:32:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-29 19:32:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-11-29 19:32:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 19:32:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-29 19:32:48,859 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-29 19:32:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-29 19:32:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:32:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-29 19:32:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:32:48,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:48,860 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:49,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 19:32:49,061 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 791196415, now seen corresponding path program 49 times [2020-11-29 19:32:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:49,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963230398] [2020-11-29 19:32:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963230398] [2020-11-29 19:32:49,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443613571] [2020-11-29 19:32:49,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:32:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:49,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:49,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:49,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 19:32:49,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822158203] [2020-11-29 19:32:49,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:32:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:32:49,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:32:49,458 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-29 19:32:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:49,993 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-29 19:32:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 19:32:49,993 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 19:32:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:49,995 INFO L225 Difference]: With dead ends: 112 [2020-11-29 19:32:49,995 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 19:32:49,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 19:32:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 19:32:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-29 19:32:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 19:32:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 19:32:49,999 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 19:32:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:49,999 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 19:32:49,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:32:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 19:32:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:32:50,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:50,000 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:50,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:50,201 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2097198353, now seen corresponding path program 50 times [2020-11-29 19:32:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:50,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574804511] [2020-11-29 19:32:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574804511] [2020-11-29 19:32:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686287125] [2020-11-29 19:32:50,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 19:32:50,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:50,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 19:32:50,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733354290] [2020-11-29 19:32:50,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:32:50,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:32:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:32:50,673 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 22 states. [2020-11-29 19:32:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:51,171 INFO L93 Difference]: Finished difference Result 156 states and 359 transitions. [2020-11-29 19:32:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 19:32:51,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 19:32:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:51,172 INFO L225 Difference]: With dead ends: 156 [2020-11-29 19:32:51,173 INFO L226 Difference]: Without dead ends: 150 [2020-11-29 19:32:51,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 19:32:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-29 19:32:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-11-29 19:32:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 19:32:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 19:32:51,176 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 19:32:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:51,176 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 19:32:51,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:32:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 19:32:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:32:51,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:51,177 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:51,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-29 19:32:51,381 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1990652807, now seen corresponding path program 51 times [2020-11-29 19:32:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:51,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041078510] [2020-11-29 19:32:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:51,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041078510] [2020-11-29 19:32:51,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936773394] [2020-11-29 19:32:51,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:51,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 19:32:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 19:32:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:51,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:51,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:51,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 19:32:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337273494] [2020-11-29 19:32:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:32:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:32:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:32:51,792 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-29 19:32:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:52,868 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-11-29 19:32:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 19:32:52,868 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 19:32:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:52,870 INFO L225 Difference]: With dead ends: 138 [2020-11-29 19:32:52,870 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 19:32:52,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 19:32:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 19:32:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 71. [2020-11-29 19:32:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 19:32:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-11-29 19:32:52,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2020-11-29 19:32:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:52,874 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-11-29 19:32:52,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:32:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-11-29 19:32:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:32:52,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:52,875 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:53,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:53,097 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1546461521, now seen corresponding path program 52 times [2020-11-29 19:32:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927433923] [2020-11-29 19:32:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:53,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927433923] [2020-11-29 19:32:53,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902022558] [2020-11-29 19:32:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:53,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:53,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:53,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 19:32:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:53,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:53,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:53,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 19:32:53,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582485554] [2020-11-29 19:32:53,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:32:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:32:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:32:53,451 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2020-11-29 19:32:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:54,441 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 19:32:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 19:32:54,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 19:32:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:54,443 INFO L225 Difference]: With dead ends: 133 [2020-11-29 19:32:54,443 INFO L226 Difference]: Without dead ends: 128 [2020-11-29 19:32:54,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 19:32:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-29 19:32:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2020-11-29 19:32:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 19:32:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-29 19:32:54,448 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-29 19:32:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:54,448 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-29 19:32:54,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:32:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-29 19:32:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:32:54,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:54,449 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:54,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:54,661 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1580720362, now seen corresponding path program 53 times [2020-11-29 19:32:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:54,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284133537] [2020-11-29 19:32:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284133537] [2020-11-29 19:32:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090581207] [2020-11-29 19:32:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:55,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-29 19:32:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:32:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:55,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:55,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:55,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 19:32:55,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507699633] [2020-11-29 19:32:55,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 19:32:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:55,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 19:32:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:55,076 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-29 19:32:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:56,150 INFO L93 Difference]: Finished difference Result 119 states and 291 transitions. [2020-11-29 19:32:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 19:32:56,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 19:32:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:56,152 INFO L225 Difference]: With dead ends: 119 [2020-11-29 19:32:56,152 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 19:32:56,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 19:32:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 19:32:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2020-11-29 19:32:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 19:32:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-11-29 19:32:56,156 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-11-29 19:32:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:56,156 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-11-29 19:32:56,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 19:32:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-11-29 19:32:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:32:56,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:56,157 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:56,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-29 19:32:56,358 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash -695644289, now seen corresponding path program 54 times [2020-11-29 19:32:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:56,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268456735] [2020-11-29 19:32:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:56,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268456735] [2020-11-29 19:32:56,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918541373] [2020-11-29 19:32:56,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:56,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 19:32:56,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 19:32:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:56,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:32:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:56,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:56,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 19:32:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577206695] [2020-11-29 19:32:56,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 19:32:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 19:32:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:56,854 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 24 states. [2020-11-29 19:32:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:58,072 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-29 19:32:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 19:32:58,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 19:32:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:58,073 INFO L225 Difference]: With dead ends: 143 [2020-11-29 19:32:58,073 INFO L226 Difference]: Without dead ends: 134 [2020-11-29 19:32:58,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 19:32:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-29 19:32:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2020-11-29 19:32:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 19:32:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-29 19:32:58,077 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-29 19:32:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:58,077 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-29 19:32:58,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 19:32:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-29 19:32:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:32:58,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:58,078 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:58,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:58,279 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 130555458, now seen corresponding path program 55 times [2020-11-29 19:32:58,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:58,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330337789] [2020-11-29 19:32:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330337789] [2020-11-29 19:32:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313478915] [2020-11-29 19:32:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 19:32:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:58,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:32:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:58,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:58,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-29 19:32:58,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435813984] [2020-11-29 19:32:58,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 19:32:58,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 19:32:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:58,745 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-11-29 19:32:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:59,311 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-29 19:32:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 19:32:59,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-29 19:32:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:59,313 INFO L225 Difference]: With dead ends: 120 [2020-11-29 19:32:59,313 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 19:32:59,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:32:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 19:32:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-11-29 19:32:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 19:32:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-29 19:32:59,318 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-29 19:32:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-29 19:32:59,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 19:32:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-29 19:32:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:32:59,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:59,319 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:59,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-29 19:32:59,520 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:59,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1067943374, now seen corresponding path program 56 times [2020-11-29 19:32:59,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:59,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063667069] [2020-11-29 19:32:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063667069] [2020-11-29 19:32:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36201589] [2020-11-29 19:32:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:32:59,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 19:32:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:59,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:59,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-29 19:32:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762315948] [2020-11-29 19:32:59,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 19:32:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 19:32:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:59,983 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 24 states. [2020-11-29 19:33:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:33:00,552 INFO L93 Difference]: Finished difference Result 168 states and 387 transitions. [2020-11-29 19:33:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 19:33:00,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-29 19:33:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:33:00,553 INFO L225 Difference]: With dead ends: 168 [2020-11-29 19:33:00,553 INFO L226 Difference]: Without dead ends: 162 [2020-11-29 19:33:00,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 19:33:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-29 19:33:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 94. [2020-11-29 19:33:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 19:33:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-29 19:33:00,557 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-29 19:33:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:33:00,558 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-29 19:33:00,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 19:33:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-29 19:33:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:33:00,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:33:00,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:33:00,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-29 19:33:00,773 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:33:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:33:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1757713572, now seen corresponding path program 57 times [2020-11-29 19:33:00,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:33:00,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9225713] [2020-11-29 19:33:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:33:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:33:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9225713] [2020-11-29 19:33:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450218882] [2020-11-29 19:33:01,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:33:01,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 19:33:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:33:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 19:33:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:33:01,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:33:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:01,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:33:01,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 19:33:01,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200222124] [2020-11-29 19:33:01,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 19:33:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:33:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 19:33:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:33:01,228 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-11-29 19:33:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:33:02,507 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-11-29 19:33:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-29 19:33:02,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-29 19:33:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:33:02,509 INFO L225 Difference]: With dead ends: 148 [2020-11-29 19:33:02,509 INFO L226 Difference]: Without dead ends: 139 [2020-11-29 19:33:02,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 19:33:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-29 19:33:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 75. [2020-11-29 19:33:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 19:33:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 183 transitions. [2020-11-29 19:33:02,513 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 183 transitions. Word has length 28 [2020-11-29 19:33:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:33:02,514 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 183 transitions. [2020-11-29 19:33:02,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 19:33:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 183 transitions. [2020-11-29 19:33:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 19:33:02,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:33:02,515 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:33:02,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-29 19:33:02,733 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:33:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:33:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash -90110990, now seen corresponding path program 58 times [2020-11-29 19:33:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:33:02,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724037068] [2020-11-29 19:33:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:33:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:33:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724037068] [2020-11-29 19:33:03,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463250836] [2020-11-29 19:33:03,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:33:03,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:33:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:33:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 19:33:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:33:03,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:33:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:03,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:33:03,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 19:33:03,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733670493] [2020-11-29 19:33:03,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 19:33:03,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:33:03,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 19:33:03,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:33:03,154 INFO L87 Difference]: Start difference. First operand 75 states and 183 transitions. Second operand 25 states. [2020-11-29 19:33:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:33:04,380 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-29 19:33:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 19:33:04,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-29 19:33:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:33:04,381 INFO L225 Difference]: With dead ends: 143 [2020-11-29 19:33:04,381 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 19:33:04,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 19:33:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 19:33:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2020-11-29 19:33:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 19:33:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-11-29 19:33:04,384 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-11-29 19:33:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:33:04,384 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-11-29 19:33:04,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 19:33:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-11-29 19:33:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:33:04,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:33:04,385 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:33:04,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-29 19:33:04,586 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:33:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:33:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1345428627, now seen corresponding path program 59 times [2020-11-29 19:33:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:33:04,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805669411] [2020-11-29 19:33:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:33:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:33:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:04,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805669411] [2020-11-29 19:33:04,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865677055] [2020-11-29 19:33:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:33:04,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 19:33:04,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:33:04,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:33:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:33:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:04,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:33:04,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-11-29 19:33:04,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959808718] [2020-11-29 19:33:04,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:33:04,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:33:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:33:04,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:33:04,887 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-11-29 19:33:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:33:04,922 INFO L93 Difference]: Finished difference Result 419 states and 1009 transitions. [2020-11-29 19:33:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:33:04,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-29 19:33:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:33:04,924 INFO L225 Difference]: With dead ends: 419 [2020-11-29 19:33:04,924 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 19:33:04,924 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 [2020-11-29 19:33:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 19:33:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-29 19:33:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 19:33:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 124 transitions. [2020-11-29 19:33:04,926 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 124 transitions. Word has length 29 [2020-11-29 19:33:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:33:04,926 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 124 transitions. [2020-11-29 19:33:04,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:33:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 124 transitions. [2020-11-29 19:33:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:33:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:33:04,927 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:33:05,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:33:05,134 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:33:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:33:05,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1501549212, now seen corresponding path program 60 times [2020-11-29 19:33:05,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:33:05,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951446827] [2020-11-29 19:33:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:33:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:33:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951446827] [2020-11-29 19:33:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955402851] [2020-11-29 19:33:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/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 [2020-11-29 19:33:05,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-29 19:33:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:33:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:33:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:33:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:33:05,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:33:05,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-11-29 19:33:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675969050] [2020-11-29 19:33:05,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:33:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:33:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:33:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:33:05,414 INFO L87 Difference]: Start difference. First operand 64 states and 124 transitions. Second operand 13 states. [2020-11-29 19:33:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:33:05,441 INFO L93 Difference]: Finished difference Result 232 states and 407 transitions. [2020-11-29 19:33:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:33:05,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-29 19:33:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:33:05,442 INFO L225 Difference]: With dead ends: 232 [2020-11-29 19:33:05,443 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:33:05,443 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 [2020-11-29 19:33:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:33:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:33:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:33:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:33:05,443 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-29 19:33:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:33:05,444 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:33:05,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:33:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:33:05,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:33:05,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:33:05,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:33:05 BasicIcfg [2020-11-29 19:33:05,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:33:05,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:33:05,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:33:05,649 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:33:05,649 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:31:59" (3/4) ... [2020-11-29 19:33:05,654 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:33:05,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-11-29 19:33:05,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-11-29 19:33:05,667 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-29 19:33:05,668 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:33:05,668 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 19:33:05,668 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:33:05,735 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a338a564-507a-4955-aeec-a3c474877214/bin/uautomizer/witness.graphml [2020-11-29 19:33:05,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:33:05,737 INFO L168 Benchmark]: Toolchain (without parser) took 67530.49 ms. Allocated memory was 81.8 MB in the beginning and 302.0 MB in the end (delta: 220.2 MB). Free memory was 48.0 MB in the beginning and 153.0 MB in the end (delta: -105.0 MB). Peak memory consumption was 114.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,737 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 55.2 MB in the beginning and 55.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:33:05,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.08 ms. Allocated memory is still 81.8 MB. Free memory was 47.9 MB in the beginning and 41.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 81.8 MB. Free memory was 41.2 MB in the beginning and 39.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,739 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 81.8 MB. Free memory was 39.1 MB in the beginning and 38.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:33:05,739 INFO L168 Benchmark]: RCFGBuilder took 723.46 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 38.0 MB in the beginning and 62.5 MB in the end (delta: -24.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,740 INFO L168 Benchmark]: TraceAbstraction took 65892.12 ms. Allocated memory was 98.6 MB in the beginning and 302.0 MB in the end (delta: 203.4 MB). Free memory was 61.9 MB in the beginning and 156.2 MB in the end (delta: -94.3 MB). Peak memory consumption was 111.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,740 INFO L168 Benchmark]: Witness Printer took 87.09 ms. Allocated memory is still 302.0 MB. Free memory was 156.2 MB in the beginning and 153.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:33:05,743 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 81.8 MB. Free memory was 55.2 MB in the beginning and 55.2 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 729.08 ms. Allocated memory is still 81.8 MB. Free memory was 47.9 MB in the beginning and 41.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 81.8 MB. Free memory was 41.2 MB in the beginning and 39.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 81.8 MB. Free memory was 39.1 MB in the beginning and 38.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 723.46 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 38.0 MB in the beginning and 62.5 MB in the end (delta: -24.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 65892.12 ms. Allocated memory was 98.6 MB in the beginning and 302.0 MB in the end (delta: 203.4 MB). Free memory was 61.9 MB in the beginning and 156.2 MB in the end (delta: -94.3 MB). Peak memory consumption was 111.0 MB. Max. memory is 16.1 GB. * Witness Printer took 87.09 ms. Allocated memory is still 302.0 MB. Free memory was 156.2 MB in the beginning and 153.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 2.9s, 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: 65.7s, OverallIterations: 62, TraceHistogramMax: 11, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 993 SDtfs, 3430 SDslu, 4713 SDs, 0 SdLazy, 5146 SolverSat, 2878 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2933 GetRequests, 985 SyntacticMatches, 45 SemanticMatches, 1903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18677 ImplicationChecksByTransitivity, 33.0s 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: 0.7s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 2294 NumberOfCodeBlocks, 2294 NumberOfCodeBlocksAsserted, 291 NumberOfCheckSat, 2176 ConstructedInterpolants, 0 QuantifiedInterpolants, 191090 SizeOfPredicates, 639 NumberOfNonLiveVariables, 7728 ConjunctsInSsa, 885 ConjunctsInUnsatCore, 118 InterpolantComputations, 8 PerfectInterpolantSequences, 380/4180 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...