./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-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_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 37b183961076d6fcb23260763ff12b2e8c94306b 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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 20:13:14,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:13:14,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:13:14,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:13:14,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:13:14,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:13:14,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:13:14,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:13:14,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:13:14,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:13:14,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:13:14,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:13:14,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:13:14,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:13:14,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:13:14,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:13:14,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:13:14,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:13:14,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:13:14,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:13:14,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:13:14,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:13:14,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:13:14,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:13:14,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:13:14,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:13:14,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:13:14,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:13:14,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:13:14,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:13:14,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:13:14,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:13:14,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:13:14,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:13:14,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:13:14,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:13:14,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:13:14,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:13:14,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:13:14,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:13:14,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:13:14,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:13:14,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:13:14,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:13:14,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:13:14,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:13:14,732 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:13:14,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:13:14,733 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:13:14,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:13:14,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:13:14,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:13:14,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:13:14,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:13:14,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:13:14,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:13:14,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:13:14,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:13:14,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:13:14,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:13:14,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:13:14,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:13:14,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:13:14,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:13:14,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:13:14,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:13:14,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:13:14,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:13:14,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:13:14,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:13:14,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:13:14,739 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_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b183961076d6fcb23260763ff12b2e8c94306b [2020-11-29 20:13:14,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:13:15,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:13:15,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:13:15,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:13:15,020 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:13:15,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2020-11-29 20:13:15,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/data/2b6f16de3/b179e2b158ab4229bc0d70d27073ae2a/FLAG75189a822 [2020-11-29 20:13:15,745 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:13:15,745 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/sv-benchmarks/c/pthread/triangular-longest-1.i [2020-11-29 20:13:15,768 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/data/2b6f16de3/b179e2b158ab4229bc0d70d27073ae2a/FLAG75189a822 [2020-11-29 20:13:16,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/data/2b6f16de3/b179e2b158ab4229bc0d70d27073ae2a [2020-11-29 20:13:16,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:13:16,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:13:16,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:13:16,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:13:16,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:13:16,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce5d7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16, skipping insertion in model container [2020-11-29 20:13:16,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:13:16,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:13:16,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:13:16,507 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:13:16,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:13:16,630 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:13:16,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16 WrapperNode [2020-11-29 20:13:16,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:13:16,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:13:16,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:13:16,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:13:16,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:13:16,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:13:16,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:13:16,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:13:16,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... [2020-11-29 20:13:16,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:13:16,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:13:16,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:13:16,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:13:16,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-29 20:13:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-29 20:13:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-29 20:13:16,823 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-29 20:13:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:13:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-29 20:13:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:13:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:13:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:13:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-29 20:13:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:13:16,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:13:16,828 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 20:13:17,378 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:13:17,379 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-29 20:13:17,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:17 BoogieIcfgContainer [2020-11-29 20:13:17,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:13:17,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:13:17,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:13:17,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:13:17,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:13:16" (1/3) ... [2020-11-29 20:13:17,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d636cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:13:17, skipping insertion in model container [2020-11-29 20:13:17,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:16" (2/3) ... [2020-11-29 20:13:17,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d636cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:13:17, skipping insertion in model container [2020-11-29 20:13:17,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:17" (3/3) ... [2020-11-29 20:13:17,390 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-11-29 20:13:17,401 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-29 20:13:17,401 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:13:17,406 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:13:17,406 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-29 20:13:17,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,445 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,445 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,448 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,449 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,449 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,449 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,450 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,451 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,451 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,452 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,452 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,453 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,454 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,456 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,457 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,457 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,458 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,463 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,463 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,464 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,464 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 20:13:17,471 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-29 20:13:17,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-29 20:13:17,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:13:17,513 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:13:17,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:13:17,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:13:17,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:13:17,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:13:17,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:13:17,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:13:17,527 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-29 20:13:17,529 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 20:13:17,532 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 20:13:17,534 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-29 20:13:17,592 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-29 20:13:17,592 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-29 20:13:17,601 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 20:13:17,609 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-29 20:13:19,212 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-29 20:13:19,711 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-29 20:13:19,901 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 20:13:19,913 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-29 20:13:19,913 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-29 20:13:19,920 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-29 20:13:19,931 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-29 20:13:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-29 20:13:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:13:19,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:19,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:13:19,939 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-29 20:13:19,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:19,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856147676] [2020-11-29 20:13:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:20,186 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 20:13:20,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856147676] [2020-11-29 20:13:20,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:20,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:13:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490981248] [2020-11-29 20:13:20,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:13:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:13:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:13:20,212 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-29 20:13:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:20,271 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-29 20:13:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:13:20,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-29 20:13:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:20,282 INFO L225 Difference]: With dead ends: 75 [2020-11-29 20:13:20,282 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 20:13:20,283 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 20:13:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 20:13:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 20:13:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:13:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-29 20:13:20,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-29 20:13:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:20,323 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-29 20:13:20,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:13:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-29 20:13:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 20:13:20,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:20,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:20,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:13:20,331 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-29 20:13:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:20,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307036886] [2020-11-29 20:13:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:13:20,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307036886] [2020-11-29 20:13:20,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:20,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:13:20,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438980467] [2020-11-29 20:13:20,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:13:20,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:20,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:13:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:13:20,444 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-29 20:13:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:20,485 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-29 20:13:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:13:20,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 20:13:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:20,488 INFO L225 Difference]: With dead ends: 56 [2020-11-29 20:13:20,488 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:13:20,488 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 20:13:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:13:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-29 20:13:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:13:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-29 20:13:20,495 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-29 20:13:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:20,496 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-29 20:13:20,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:13:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-29 20:13:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:13:20,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:20,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:20,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:13:20,500 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-29 20:13:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:20,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650845709] [2020-11-29 20:13:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:20,612 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 20:13:20,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650845709] [2020-11-29 20:13:20,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:20,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:13:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618633557] [2020-11-29 20:13:20,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:13:20,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:13:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:13:20,614 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-29 20:13:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:20,711 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-29 20:13:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:13:20,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 20:13:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:20,714 INFO L225 Difference]: With dead ends: 54 [2020-11-29 20:13:20,714 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 20:13:20,714 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 20:13:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 20:13:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-29 20:13:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:13:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-29 20:13:20,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-29 20:13:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:20,722 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-29 20:13:20,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:13:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-29 20:13:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:13:20,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:20,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:20,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:13:20,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-29 20:13:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301830533] [2020-11-29 20:13:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:20,851 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 20:13:20,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301830533] [2020-11-29 20:13:20,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:20,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:13:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973536160] [2020-11-29 20:13:20,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:13:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:13:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:13:20,854 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-29 20:13:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:20,961 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-29 20:13:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:13:20,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 20:13:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:20,967 INFO L225 Difference]: With dead ends: 84 [2020-11-29 20:13:20,967 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 20:13:20,967 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 20:13:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 20:13:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-29 20:13:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 20:13:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 20:13:20,984 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-29 20:13:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:20,984 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 20:13:20,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:13:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 20:13:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:13:20,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:20,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:20,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:13:20,986 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-29 20:13:20,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:20,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250554220] [2020-11-29 20:13:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:21,048 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 20:13:21,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250554220] [2020-11-29 20:13:21,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:21,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:13:21,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256900376] [2020-11-29 20:13:21,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:13:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:13:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:13:21,050 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-29 20:13:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:21,140 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-29 20:13:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:13:21,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 20:13:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:21,141 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:13:21,142 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:13:21,142 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 20:13:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:13:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 20:13:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:13:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-29 20:13:21,148 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-29 20:13:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:21,148 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-29 20:13:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:13:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-29 20:13:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:13:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:21,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:21,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:13:21,150 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-29 20:13:21,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:21,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185240195] [2020-11-29 20:13:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:21,233 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 20:13:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185240195] [2020-11-29 20:13:21,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:21,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:13:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614905781] [2020-11-29 20:13:21,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:13:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:13:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:13:21,235 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-29 20:13:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:21,323 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-29 20:13:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:13:21,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 20:13:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:21,329 INFO L225 Difference]: With dead ends: 55 [2020-11-29 20:13:21,330 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:13:21,330 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 20:13:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:13:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 20:13:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 20:13:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-29 20:13:21,335 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-29 20:13:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:21,335 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-29 20:13:21,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:13:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-29 20:13:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:13:21,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:21,337 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:21,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:13:21,337 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-29 20:13:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:21,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384401884] [2020-11-29 20:13:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:21,438 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 20:13:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384401884] [2020-11-29 20:13:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639410014] [2020-11-29 20:13:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:21,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:21,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:13:21,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:21,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:21,692 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 20:13:21,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:21,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 20:13:21,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823560025] [2020-11-29 20:13:21,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:13:21,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:13:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:13:21,693 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-29 20:13:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:21,868 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-11-29 20:13:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:13:21,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 20:13:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:21,870 INFO L225 Difference]: With dead ends: 55 [2020-11-29 20:13:21,870 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:13:21,870 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 20:13:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:13:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 20:13:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:13:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-29 20:13:21,875 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-29 20:13:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:21,875 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-29 20:13:21,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:13:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-29 20:13:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:13:21,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:21,876 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:22,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 20:13:22,078 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-11-29 20:13:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950198113] [2020-11-29 20:13:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:22,190 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 20:13:22,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950198113] [2020-11-29 20:13:22,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110252128] [2020-11-29 20:13:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:22,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-29 20:13:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:13:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:22,310 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 20:13:22,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:22,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 20:13:22,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309117760] [2020-11-29 20:13:22,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:13:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:13:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:13:22,312 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-11-29 20:13:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:22,573 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 20:13:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:13:22,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 20:13:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:22,575 INFO L225 Difference]: With dead ends: 64 [2020-11-29 20:13:22,575 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 20:13:22,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:13:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 20:13:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-29 20:13:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 20:13:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-29 20:13:22,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-29 20:13:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:22,582 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-29 20:13:22,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:13:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-29 20:13:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:13:22,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:22,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:22,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:22,784 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-11-29 20:13:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:22,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412850862] [2020-11-29 20:13:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:22,921 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 20:13:22,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412850862] [2020-11-29 20:13:22,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990988316] [2020-11-29 20:13:22,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:13:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:23,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:23,054 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 20:13:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:23,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:13:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427163275] [2020-11-29 20:13:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:13:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:23,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:13:23,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:13:23,056 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-29 20:13:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:23,203 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-29 20:13:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:13:23,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 20:13:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:23,205 INFO L225 Difference]: With dead ends: 56 [2020-11-29 20:13:23,205 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:13:23,205 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 20:13:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:13:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-29 20:13:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 20:13:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 20:13:23,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 20:13:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:23,213 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 20:13:23,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:13:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 20:13:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:13:23,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:23,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:23,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:23,437 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-11-29 20:13:23,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:23,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316912225] [2020-11-29 20:13:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:23,544 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 20:13:23,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316912225] [2020-11-29 20:13:23,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237836800] [2020-11-29 20:13:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:23,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:13:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:23,665 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 20:13:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:23,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 20:13:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874368522] [2020-11-29 20:13:23,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:13:23,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:13:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:13:23,671 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-11-29 20:13:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:23,896 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-11-29 20:13:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:13:23,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 20:13:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:23,900 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:13:23,900 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 20:13:23,900 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 20:13:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 20:13:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-29 20:13:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 20:13:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 20:13:23,918 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 20:13:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:23,919 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 20:13:23,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:13:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 20:13:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:13:23,920 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:23,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:24,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:24,140 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-11-29 20:13:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:24,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366535302] [2020-11-29 20:13:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:24,267 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 20:13:24,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366535302] [2020-11-29 20:13:24,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722440942] [2020-11-29 20:13:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:24,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 20:13:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:13:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:24,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:24,439 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 20:13:24,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:24,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 20:13:24,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189346351] [2020-11-29 20:13:24,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:13:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:13:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:13:24,442 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-29 20:13:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:24,747 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-11-29 20:13:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:13:24,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 20:13:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:24,749 INFO L225 Difference]: With dead ends: 68 [2020-11-29 20:13:24,749 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 20:13:24,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:13:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 20:13:24,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-11-29 20:13:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 20:13:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-11-29 20:13:24,755 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-11-29 20:13:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:24,755 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-11-29 20:13:24,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:13:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-11-29 20:13:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:13:24,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:24,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:24,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 20:13:24,960 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-11-29 20:13:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:24,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978263471] [2020-11-29 20:13:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:25,081 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 20:13:25,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978263471] [2020-11-29 20:13:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037202781] [2020-11-29 20:13:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:25,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:13:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:25,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:25,210 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 20:13:25,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:25,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 20:13:25,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109727586] [2020-11-29 20:13:25,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:13:25,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:13:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:13:25,212 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-11-29 20:13:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:25,507 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-29 20:13:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:13:25,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 20:13:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:25,508 INFO L225 Difference]: With dead ends: 63 [2020-11-29 20:13:25,508 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 20:13:25,509 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 20:13:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 20:13:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-29 20:13:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 20:13:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 20:13:25,513 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-29 20:13:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:25,513 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 20:13:25,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:13:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 20:13:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:13:25,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:25,515 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:25,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:25,715 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-11-29 20:13:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:25,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341027239] [2020-11-29 20:13:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:25,823 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 20:13:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341027239] [2020-11-29 20:13:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732168862] [2020-11-29 20:13:25,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:25,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-29 20:13:25,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:13:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:25,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:25,975 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 20:13:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 20:13:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262180451] [2020-11-29 20:13:25,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:13:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:13:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:25,977 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-29 20:13:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:26,268 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-11-29 20:13:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:13:26,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 20:13:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:26,269 INFO L225 Difference]: With dead ends: 63 [2020-11-29 20:13:26,270 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 20:13:26,270 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 20:13:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 20:13:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-11-29 20:13:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 20:13:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-11-29 20:13:26,275 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-11-29 20:13:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:26,275 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-11-29 20:13:26,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:13:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-11-29 20:13:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:13:26,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:26,276 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:26,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:26,477 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-11-29 20:13:26,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:26,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493289074] [2020-11-29 20:13:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:26,600 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 20:13:26,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493289074] [2020-11-29 20:13:26,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849486798] [2020-11-29 20:13:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:26,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 20:13:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:13:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:26,752 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 20:13:26,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:26,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 20:13:26,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035189206] [2020-11-29 20:13:26,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:13:26,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:13:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:26,754 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-11-29 20:13:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:27,143 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 20:13:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:13:27,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 20:13:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:27,145 INFO L225 Difference]: With dead ends: 73 [2020-11-29 20:13:27,145 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 20:13:27,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 20:13:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-11-29 20:13:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 20:13:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-29 20:13:27,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-29 20:13:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:27,150 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-29 20:13:27,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:13:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-29 20:13:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:13:27,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:27,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:27,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:13:27,372 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-11-29 20:13:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:27,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615859286] [2020-11-29 20:13:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:27,572 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 20:13:27,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615859286] [2020-11-29 20:13:27,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157815074] [2020-11-29 20:13:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:13:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:27,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:27,688 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 20:13:27,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:27,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 20:13:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69050477] [2020-11-29 20:13:27,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:13:27,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:13:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:27,694 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-29 20:13:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:27,970 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 20:13:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:13:27,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 20:13:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:27,972 INFO L225 Difference]: With dead ends: 64 [2020-11-29 20:13:27,972 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 20:13:27,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:13:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 20:13:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-29 20:13:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 20:13:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 20:13:27,978 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 20:13:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:27,978 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 20:13:27,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:13:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 20:13:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:13:27,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:27,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:28,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 20:13:28,181 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-11-29 20:13:28,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764868991] [2020-11-29 20:13:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:28,327 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 20:13:28,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764868991] [2020-11-29 20:13:28,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892336462] [2020-11-29 20:13:28,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:28,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:13:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:28,429 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 20:13:28,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:28,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 20:13:28,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899117051] [2020-11-29 20:13:28,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:13:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:28,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:13:28,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:13:28,443 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-11-29 20:13:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:28,639 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-11-29 20:13:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:13:28,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 20:13:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:28,641 INFO L225 Difference]: With dead ends: 84 [2020-11-29 20:13:28,641 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 20:13:28,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:13:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 20:13:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-11-29 20:13:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 20:13:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 20:13:28,646 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 20:13:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:28,646 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 20:13:28,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:13:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 20:13:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:13:28,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:28,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:28,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:13:28,868 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-11-29 20:13:28,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:28,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839256825] [2020-11-29 20:13:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:28,985 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 20:13:28,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839256825] [2020-11-29 20:13:28,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550689924] [2020-11-29 20:13:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:29,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 20:13:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:13:29,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:29,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:29,142 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 20:13:29,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:29,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 20:13:29,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845769368] [2020-11-29 20:13:29,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:13:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:13:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:13:29,144 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-29 20:13:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:29,589 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-11-29 20:13:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:13:29,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 20:13:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:29,590 INFO L225 Difference]: With dead ends: 78 [2020-11-29 20:13:29,591 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:13:29,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:13:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:13:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-11-29 20:13:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 20:13:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-29 20:13:29,595 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-11-29 20:13:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:29,596 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-29 20:13:29,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:13:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-29 20:13:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:13:29,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:29,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:29,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:13:29,815 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-11-29 20:13:29,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:29,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101338280] [2020-11-29 20:13:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:29,938 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 20:13:29,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101338280] [2020-11-29 20:13:29,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206944156] [2020-11-29 20:13:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:30,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:13:30,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:30,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:30,055 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 20:13:30,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:30,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 20:13:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252213402] [2020-11-29 20:13:30,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:13:30,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:13:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:13:30,057 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-11-29 20:13:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:30,403 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 20:13:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:13:30,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 20:13:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:30,405 INFO L225 Difference]: With dead ends: 73 [2020-11-29 20:13:30,405 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 20:13:30,405 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 20:13:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 20:13:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-11-29 20:13:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 20:13:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-29 20:13:30,427 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-29 20:13:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:30,427 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-29 20:13:30,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:13:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-29 20:13:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:13:30,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:30,429 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:30,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:13:30,638 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-11-29 20:13:30,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:30,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878787863] [2020-11-29 20:13:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:30,740 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 20:13:30,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878787863] [2020-11-29 20:13:30,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995395405] [2020-11-29 20:13:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:30,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 20:13:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:13:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:30,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:30,866 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 20:13:30,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:30,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:13:30,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894276332] [2020-11-29 20:13:30,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:13:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:13:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:30,868 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-29 20:13:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:31,208 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-11-29 20:13:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:13:31,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 20:13:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:31,209 INFO L225 Difference]: With dead ends: 71 [2020-11-29 20:13:31,209 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 20:13:31,210 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 20:13:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 20:13:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-11-29 20:13:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 20:13:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-29 20:13:31,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-11-29 20:13:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:31,214 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-29 20:13:31,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:13:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-29 20:13:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:13:31,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:31,215 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:31,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:31,424 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-11-29 20:13:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:31,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360746207] [2020-11-29 20:13:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:31,585 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 20:13:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360746207] [2020-11-29 20:13:31,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494670308] [2020-11-29 20:13:31,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:31,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 20:13:31,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:13:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:31,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:31,739 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 20:13:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:31,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:13:31,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202310573] [2020-11-29 20:13:31,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:13:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:13:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:31,741 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-11-29 20:13:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:32,216 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 20:13:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:13:32,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 20:13:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:32,220 INFO L225 Difference]: With dead ends: 83 [2020-11-29 20:13:32,220 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 20:13:32,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:13:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 20:13:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-11-29 20:13:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 20:13:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-29 20:13:32,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-29 20:13:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:32,225 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-29 20:13:32,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:13:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-29 20:13:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:13:32,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:32,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:32,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:32,426 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:32,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-11-29 20:13:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:32,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253684752] [2020-11-29 20:13:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:32,611 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 20:13:32,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253684752] [2020-11-29 20:13:32,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729116799] [2020-11-29 20:13:32,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:13:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:32,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:32,709 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 20:13:32,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:32,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 20:13:32,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544178276] [2020-11-29 20:13:32,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:13:32,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:13:32,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:32,711 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-29 20:13:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:33,011 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-29 20:13:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:13:33,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 20:13:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:33,013 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:13:33,013 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 20:13:33,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 20:13:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-29 20:13:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 20:13:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 20:13:33,018 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 20:13:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:33,019 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 20:13:33,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:13:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 20:13:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:13:33,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:33,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:33,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 20:13:33,232 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-11-29 20:13:33,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:33,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117988152] [2020-11-29 20:13:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:33,374 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 20:13:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117988152] [2020-11-29 20:13:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075225456] [2020-11-29 20:13:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:33,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:13:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:33,470 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 20:13:33,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:33,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 20:13:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630651753] [2020-11-29 20:13:33,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:13:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:13:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:13:33,472 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-11-29 20:13:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:33,667 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-11-29 20:13:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:13:33,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 20:13:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:33,668 INFO L225 Difference]: With dead ends: 96 [2020-11-29 20:13:33,668 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 20:13:33,669 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 20:13:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 20:13:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-11-29 20:13:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 20:13:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 20:13:33,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 20:13:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:33,673 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 20:13:33,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:13:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 20:13:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:13:33,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:33,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:33,875 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-11-29 20:13:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:33,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883415717] [2020-11-29 20:13:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:34,009 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 20:13:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883415717] [2020-11-29 20:13:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602360359] [2020-11-29 20:13:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:34,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:13:34,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:13:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:34,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:34,126 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 20:13:34,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:34,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 20:13:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053832785] [2020-11-29 20:13:34,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:13:34,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:13:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:13:34,127 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-29 20:13:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:34,547 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-11-29 20:13:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:13:34,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 20:13:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:34,549 INFO L225 Difference]: With dead ends: 88 [2020-11-29 20:13:34,549 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 20:13:34,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:13:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 20:13:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-11-29 20:13:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 20:13:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-11-29 20:13:34,552 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-11-29 20:13:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:34,552 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-11-29 20:13:34,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:13:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-11-29 20:13:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:13:34,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:34,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:34,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 20:13:34,753 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-11-29 20:13:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:34,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947936042] [2020-11-29 20:13:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:34,858 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 20:13:34,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947936042] [2020-11-29 20:13:34,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898888427] [2020-11-29 20:13:34,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:34,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:34,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:13:34,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:34,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:34,985 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 20:13:34,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:34,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 20:13:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973436371] [2020-11-29 20:13:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:13:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:13:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:13:34,986 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-11-29 20:13:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:35,357 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 20:13:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:13:35,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 20:13:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:35,358 INFO L225 Difference]: With dead ends: 83 [2020-11-29 20:13:35,358 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 20:13:35,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:13:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 20:13:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-11-29 20:13:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 20:13:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-29 20:13:35,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-29 20:13:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:35,361 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-29 20:13:35,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:13:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-29 20:13:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 20:13:35,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:35,362 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:35,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 20:13:35,572 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-11-29 20:13:35,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:35,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017867496] [2020-11-29 20:13:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:35,680 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 20:13:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017867496] [2020-11-29 20:13:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252301735] [2020-11-29 20:13:35,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:35,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 20:13:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:13:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:35,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:35,830 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 20:13:35,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:35,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 20:13:35,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483590097] [2020-11-29 20:13:35,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:13:35,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:13:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:35,831 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-29 20:13:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:36,339 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-11-29 20:13:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:13:36,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 20:13:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:36,340 INFO L225 Difference]: With dead ends: 79 [2020-11-29 20:13:36,340 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 20:13:36,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-29 20:13:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 20:13:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-11-29 20:13:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 20:13:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 20:13:36,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-11-29 20:13:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:36,342 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 20:13:36,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:13:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 20:13:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 20:13:36,343 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:36,343 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:36,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 20:13:36,543 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-11-29 20:13:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:36,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492537606] [2020-11-29 20:13:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:36,632 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 20:13:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492537606] [2020-11-29 20:13:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025123539] [2020-11-29 20:13:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:36,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 20:13:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:13:36,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:36,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:36,761 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 20:13:36,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:36,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 20:13:36,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088959133] [2020-11-29 20:13:36,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:13:36,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:13:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:36,763 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-11-29 20:13:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:37,271 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 20:13:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:13:37,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 20:13:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:37,273 INFO L225 Difference]: With dead ends: 93 [2020-11-29 20:13:37,273 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 20:13:37,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:13:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 20:13:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-11-29 20:13:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 20:13:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-29 20:13:37,276 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-29 20:13:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:37,277 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-29 20:13:37,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:13:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-29 20:13:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:13:37,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:37,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 20:13:37,478 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-11-29 20:13:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:37,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503117179] [2020-11-29 20:13:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:37,674 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 20:13:37,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503117179] [2020-11-29 20:13:37,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025864008] [2020-11-29 20:13:37,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:37,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:13:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:37,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:37,762 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 20:13:37,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:37,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 20:13:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838785325] [2020-11-29 20:13:37,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:13:37,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:37,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:13:37,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:37,773 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-29 20:13:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:38,016 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-29 20:13:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:13:38,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 20:13:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:38,018 INFO L225 Difference]: With dead ends: 80 [2020-11-29 20:13:38,018 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 20:13:38,018 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 20:13:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 20:13:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-29 20:13:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:13:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 20:13:38,021 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 20:13:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:38,021 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 20:13:38,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:13:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 20:13:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:13:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:38,022 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:38,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 20:13:38,222 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1673993827, now seen corresponding path program 26 times [2020-11-29 20:13:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:38,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253346213] [2020-11-29 20:13:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:38,374 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 20:13:38,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253346213] [2020-11-29 20:13:38,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647269603] [2020-11-29 20:13:38,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:38,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:38,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:13:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:38,441 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 20:13:38,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:38,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 20:13:38,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684796075] [2020-11-29 20:13:38,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:13:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:13:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:13:38,445 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 14 states. [2020-11-29 20:13:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:38,714 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-11-29 20:13:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:13:38,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 20:13:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:38,715 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:13:38,716 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 20:13:38,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:13:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 20:13:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2020-11-29 20:13:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:13:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 20:13:38,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 20:13:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:38,719 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 20:13:38,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:13:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 20:13:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:13:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:38,720 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:38,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:38,921 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1248727405, now seen corresponding path program 27 times [2020-11-29 20:13:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424152409] [2020-11-29 20:13:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:39,059 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 20:13:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424152409] [2020-11-29 20:13:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608705285] [2020-11-29 20:13:39,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:39,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 20:13:39,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:13:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:39,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:39,175 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 20:13:39,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:39,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 20:13:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877992237] [2020-11-29 20:13:39,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 20:13:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:13:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:13:39,177 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-29 20:13:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:39,678 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-11-29 20:13:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 20:13:39,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 20:13:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:39,682 INFO L225 Difference]: With dead ends: 98 [2020-11-29 20:13:39,682 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 20:13:39,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:13:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 20:13:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-11-29 20:13:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 20:13:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 133 transitions. [2020-11-29 20:13:39,687 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 133 transitions. Word has length 18 [2020-11-29 20:13:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:39,687 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 133 transitions. [2020-11-29 20:13:39,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 20:13:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 133 transitions. [2020-11-29 20:13:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:13:39,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:39,688 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:39,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 20:13:39,900 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1968167459, now seen corresponding path program 28 times [2020-11-29 20:13:39,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:39,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842323036] [2020-11-29 20:13:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:40,037 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 20:13:40,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842323036] [2020-11-29 20:13:40,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689233291] [2020-11-29 20:13:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:40,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:40,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:13:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:40,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:40,141 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 20:13:40,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:40,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 20:13:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403193376] [2020-11-29 20:13:40,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 20:13:40,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:40,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:13:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:13:40,143 INFO L87 Difference]: Start difference. First operand 55 states and 133 transitions. Second operand 15 states. [2020-11-29 20:13:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:40,592 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 20:13:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 20:13:40,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 20:13:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:40,601 INFO L225 Difference]: With dead ends: 93 [2020-11-29 20:13:40,601 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 20:13:40,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:13:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 20:13:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-11-29 20:13:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 20:13:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-29 20:13:40,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-29 20:13:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:40,605 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-29 20:13:40,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 20:13:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-29 20:13:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:13:40,606 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:40,606 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:40,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:40,816 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash -55818402, now seen corresponding path program 29 times [2020-11-29 20:13:40,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:40,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749372253] [2020-11-29 20:13:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:40,978 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 20:13:40,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749372253] [2020-11-29 20:13:40,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241711529] [2020-11-29 20:13:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:41,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 20:13:41,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:41,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:13:41,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:41,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:41,081 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 20:13:41,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:41,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 20:13:41,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968370936] [2020-11-29 20:13:41,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:13:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:13:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:13:41,082 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-29 20:13:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:41,541 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-11-29 20:13:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 20:13:41,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 20:13:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:41,547 INFO L225 Difference]: With dead ends: 87 [2020-11-29 20:13:41,547 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 20:13:41,548 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 20:13:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 20:13:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-11-29 20:13:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 20:13:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-11-29 20:13:41,550 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-11-29 20:13:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:41,550 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-11-29 20:13:41,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:13:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-11-29 20:13:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:13:41,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:41,551 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:41,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 20:13:41,768 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:41,768 INFO L82 PathProgramCache]: Analyzing trace with hash 883671691, now seen corresponding path program 30 times [2020-11-29 20:13:41,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:41,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861891539] [2020-11-29 20:13:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:41,928 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 20:13:41,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861891539] [2020-11-29 20:13:41,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607347677] [2020-11-29 20:13:41,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:42,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-29 20:13:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:13:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:42,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:42,067 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 20:13:42,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:42,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 20:13:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636428217] [2020-11-29 20:13:42,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:13:42,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:42,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:13:42,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:13:42,068 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 16 states. [2020-11-29 20:13:42,452 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-11-29 20:13:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:42,817 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 20:13:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 20:13:42,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 20:13:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:42,818 INFO L225 Difference]: With dead ends: 103 [2020-11-29 20:13:42,818 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:13:42,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 20:13:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:13:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-11-29 20:13:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 20:13:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-29 20:13:42,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-29 20:13:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:42,822 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-29 20:13:42,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:13:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-29 20:13:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:13:42,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:42,823 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:43,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:43,024 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1335227574, now seen corresponding path program 31 times [2020-11-29 20:13:43,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:43,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642540177] [2020-11-29 20:13:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:43,238 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 20:13:43,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642540177] [2020-11-29 20:13:43,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941466814] [2020-11-29 20:13:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:13:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:43,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:43,304 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 20:13:43,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:43,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 20:13:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303768523] [2020-11-29 20:13:43,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:13:43,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:13:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:13:43,306 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-29 20:13:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:43,633 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-29 20:13:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:13:43,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 20:13:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:43,634 INFO L225 Difference]: With dead ends: 88 [2020-11-29 20:13:43,634 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 20:13:43,634 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 20:13:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 20:13:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-29 20:13:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 20:13:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 20:13:43,637 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 20:13:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:43,637 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 20:13:43,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:13:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 20:13:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:13:43,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:43,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:43,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 20:13:43,839 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:43,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1904656218, now seen corresponding path program 32 times [2020-11-29 20:13:43,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:43,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766067761] [2020-11-29 20:13:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:44,059 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 20:13:44,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766067761] [2020-11-29 20:13:44,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873088263] [2020-11-29 20:13:44,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:44,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:13:44,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:44,143 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 20:13:44,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:44,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 20:13:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390067852] [2020-11-29 20:13:44,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:13:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:13:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:13:44,145 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-11-29 20:13:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:44,442 INFO L93 Difference]: Finished difference Result 120 states and 275 transitions. [2020-11-29 20:13:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:13:44,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 20:13:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:44,443 INFO L225 Difference]: With dead ends: 120 [2020-11-29 20:13:44,443 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 20:13:44,444 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 20:13:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 20:13:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-11-29 20:13:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 20:13:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 20:13:44,447 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 20:13:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:44,447 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 20:13:44,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:13:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 20:13:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:13:44,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:44,448 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:44,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:44,648 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1730347856, now seen corresponding path program 33 times [2020-11-29 20:13:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:44,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066590869] [2020-11-29 20:13:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:44,770 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 20:13:44,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066590869] [2020-11-29 20:13:44,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835837671] [2020-11-29 20:13:44,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:44,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 20:13:44,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:13:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:44,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:44,870 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 20:13:44,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:44,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 20:13:44,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229681609] [2020-11-29 20:13:44,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:13:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:13:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:13:44,872 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-29 20:13:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:45,504 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-11-29 20:13:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-29 20:13:45,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 20:13:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:45,521 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:13:45,521 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 20:13:45,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:13:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 20:13:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-11-29 20:13:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 20:13:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 143 transitions. [2020-11-29 20:13:45,525 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 143 transitions. Word has length 20 [2020-11-29 20:13:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:45,525 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 143 transitions. [2020-11-29 20:13:45,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:13:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 143 transitions. [2020-11-29 20:13:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:13:45,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:45,525 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:45,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 20:13:45,727 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1624044134, now seen corresponding path program 34 times [2020-11-29 20:13:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:45,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373352169] [2020-11-29 20:13:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:45,877 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 20:13:45,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373352169] [2020-11-29 20:13:45,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045753879] [2020-11-29 20:13:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:45,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:13:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:46,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:46,048 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 20:13:46,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:46,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 20:13:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961568036] [2020-11-29 20:13:46,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:13:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:13:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:13:46,050 INFO L87 Difference]: Start difference. First operand 59 states and 143 transitions. Second operand 17 states. [2020-11-29 20:13:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:46,641 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 20:13:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:13:46,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 20:13:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:46,642 INFO L225 Difference]: With dead ends: 103 [2020-11-29 20:13:46,642 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 20:13:46,643 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 20:13:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 20:13:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-11-29 20:13:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 20:13:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-29 20:13:46,646 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-29 20:13:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:46,646 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-29 20:13:46,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:13:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-29 20:13:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 20:13:46,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:46,647 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:46,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:46,856 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2101150495, now seen corresponding path program 35 times [2020-11-29 20:13:46,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:46,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665567975] [2020-11-29 20:13:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:47,062 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 20:13:47,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665567975] [2020-11-29 20:13:47,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359348226] [2020-11-29 20:13:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:47,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 20:13:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:13:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:47,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:47,195 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 20:13:47,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:47,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 20:13:47,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91885441] [2020-11-29 20:13:47,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:13:47,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:13:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:13:47,196 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-29 20:13:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:48,018 INFO L93 Difference]: Finished difference Result 95 states and 231 transitions. [2020-11-29 20:13:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:13:48,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 20:13:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:48,019 INFO L225 Difference]: With dead ends: 95 [2020-11-29 20:13:48,019 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 20:13:48,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 20:13:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 20:13:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-11-29 20:13:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 20:13:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-11-29 20:13:48,024 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-11-29 20:13:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:48,024 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-11-29 20:13:48,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:13:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-11-29 20:13:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 20:13:48,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:48,024 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:48,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 20:13:48,233 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1194216792, now seen corresponding path program 36 times [2020-11-29 20:13:48,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:48,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061263654] [2020-11-29 20:13:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:48,418 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 20:13:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061263654] [2020-11-29 20:13:48,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711321634] [2020-11-29 20:13:48,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:48,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 20:13:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:13:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:48,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:48,549 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 20:13:48,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:48,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 20:13:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966476402] [2020-11-29 20:13:48,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:13:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:13:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:13:48,551 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 18 states. [2020-11-29 20:13:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:49,297 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 20:13:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 20:13:49,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 20:13:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:49,298 INFO L225 Difference]: With dead ends: 113 [2020-11-29 20:13:49,298 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 20:13:49,299 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 20:13:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 20:13:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-11-29 20:13:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 20:13:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-29 20:13:49,301 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-29 20:13:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:49,301 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-29 20:13:49,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:13:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-29 20:13:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:13:49,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:49,302 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:49,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 20:13:49,516 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1041510855, now seen corresponding path program 37 times [2020-11-29 20:13:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866268377] [2020-11-29 20:13:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:49,711 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 20:13:49,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866268377] [2020-11-29 20:13:49,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583852935] [2020-11-29 20:13:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:49,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:49,789 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 20:13:49,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:49,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 20:13:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108245557] [2020-11-29 20:13:49,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:13:49,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:13:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:13:49,791 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-29 20:13:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:50,106 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-29 20:13:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:13:50,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 20:13:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:50,107 INFO L225 Difference]: With dead ends: 96 [2020-11-29 20:13:50,108 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 20:13:50,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:13:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 20:13:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-29 20:13:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 20:13:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 20:13:50,111 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 20:13:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:50,111 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 20:13:50,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:13:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 20:13:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:13:50,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:50,112 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:50,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 20:13:50,312 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash -718545367, now seen corresponding path program 38 times [2020-11-29 20:13:50,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:50,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287893991] [2020-11-29 20:13:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:50,510 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 20:13:50,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287893991] [2020-11-29 20:13:50,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106410061] [2020-11-29 20:13:50,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:50,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:13:50,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:50,588 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 20:13:50,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:50,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 20:13:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582469362] [2020-11-29 20:13:50,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:13:50,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:13:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:13:50,589 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 18 states. [2020-11-29 20:13:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:50,873 INFO L93 Difference]: Finished difference Result 132 states and 303 transitions. [2020-11-29 20:13:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:13:50,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 20:13:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:50,882 INFO L225 Difference]: With dead ends: 132 [2020-11-29 20:13:50,882 INFO L226 Difference]: Without dead ends: 126 [2020-11-29 20:13:50,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:13:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-29 20:13:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 76. [2020-11-29 20:13:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 20:13:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 20:13:50,885 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 20:13:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:50,885 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 20:13:50,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:13:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 20:13:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:13:50,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:50,885 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 20:13:51,086 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -711133299, now seen corresponding path program 39 times [2020-11-29 20:13:51,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:51,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079877506] [2020-11-29 20:13:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:51,283 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 20:13:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079877506] [2020-11-29 20:13:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319627011] [2020-11-29 20:13:51,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:51,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 20:13:51,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:51,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:51,436 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 20:13:51,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:51,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 20:13:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563359760] [2020-11-29 20:13:51,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:13:51,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:13:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:13:51,437 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-29 20:13:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:52,075 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-11-29 20:13:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 20:13:52,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 20:13:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:52,076 INFO L225 Difference]: With dead ends: 118 [2020-11-29 20:13:52,076 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 20:13:52,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 20:13:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 20:13:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2020-11-29 20:13:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 20:13:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-11-29 20:13:52,080 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 22 [2020-11-29 20:13:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:52,080 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-11-29 20:13:52,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:13:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-11-29 20:13:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:13:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:52,081 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:52,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:52,296 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1634010601, now seen corresponding path program 40 times [2020-11-29 20:13:52,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:52,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465634299] [2020-11-29 20:13:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:52,487 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 20:13:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465634299] [2020-11-29 20:13:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735887914] [2020-11-29 20:13:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:52,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:52,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:13:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:52,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:52,605 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 20:13:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:52,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 20:13:52,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211018129] [2020-11-29 20:13:52,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:13:52,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:13:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:13:52,607 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 19 states. [2020-11-29 20:13:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:53,315 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 20:13:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 20:13:53,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 20:13:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:53,317 INFO L225 Difference]: With dead ends: 113 [2020-11-29 20:13:53,317 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 20:13:53,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 20:13:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 20:13:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-11-29 20:13:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 20:13:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-29 20:13:53,320 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-29 20:13:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:53,320 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-29 20:13:53,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:13:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-29 20:13:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 20:13:53,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:53,321 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:53,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-29 20:13:53,532 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash -570270300, now seen corresponding path program 41 times [2020-11-29 20:13:53,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:53,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708247559] [2020-11-29 20:13:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:53,696 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 20:13:53,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708247559] [2020-11-29 20:13:53,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735706615] [2020-11-29 20:13:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:53,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 20:13:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:53,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:53,817 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 20:13:53,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:53,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 20:13:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342971940] [2020-11-29 20:13:53,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:53,819 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-29 20:13:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:54,526 INFO L93 Difference]: Finished difference Result 103 states and 251 transitions. [2020-11-29 20:13:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 20:13:54,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 20:13:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:54,528 INFO L225 Difference]: With dead ends: 103 [2020-11-29 20:13:54,528 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 20:13:54,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 20:13:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 20:13:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-11-29 20:13:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:13:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-11-29 20:13:54,532 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-11-29 20:13:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:54,532 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-11-29 20:13:54,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-11-29 20:13:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 20:13:54,532 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:54,532 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:54,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 20:13:54,733 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -885256315, now seen corresponding path program 42 times [2020-11-29 20:13:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:54,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827586916] [2020-11-29 20:13:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:54,949 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 20:13:54,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827586916] [2020-11-29 20:13:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702036531] [2020-11-29 20:13:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:55,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-29 20:13:55,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 20:13:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:55,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:55,083 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 20:13:55,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:55,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 20:13:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759829957] [2020-11-29 20:13:55,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:55,084 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 20 states. [2020-11-29 20:13:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:55,812 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 20:13:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 20:13:55,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 20:13:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:55,813 INFO L225 Difference]: With dead ends: 123 [2020-11-29 20:13:55,813 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 20:13:55,814 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 20:13:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 20:13:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-11-29 20:13:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 20:13:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-29 20:13:55,817 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-29 20:13:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:55,817 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-29 20:13:55,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-29 20:13:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:13:55,818 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:55,818 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:56,032 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -164539652, now seen corresponding path program 43 times [2020-11-29 20:13:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:56,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119417536] [2020-11-29 20:13:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:56,298 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 20:13:56,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119417536] [2020-11-29 20:13:56,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268498101] [2020-11-29 20:13:56,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:13:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:56,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:56,368 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 20:13:56,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:56,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 20:13:56,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782731536] [2020-11-29 20:13:56,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:56,370 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-29 20:13:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:56,757 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-29 20:13:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:13:56,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 20:13:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:56,758 INFO L225 Difference]: With dead ends: 104 [2020-11-29 20:13:56,758 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 20:13:56,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:13:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 20:13:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-29 20:13:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 20:13:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 20:13:56,762 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 20:13:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:56,762 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 20:13:56,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 20:13:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:13:56,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:56,762 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:56,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 20:13:56,963 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 967649004, now seen corresponding path program 44 times [2020-11-29 20:13:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:56,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479898587] [2020-11-29 20:13:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:57,248 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 20:13:57,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479898587] [2020-11-29 20:13:57,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329029246] [2020-11-29 20:13:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:57,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:13:57,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:57,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:13:57,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:57,362 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 20:13:57,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:57,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 20:13:57,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117585000] [2020-11-29 20:13:57,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:13:57,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:13:57,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:13:57,364 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 20 states. [2020-11-29 20:13:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:57,767 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2020-11-29 20:13:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:13:57,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 20:13:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:57,769 INFO L225 Difference]: With dead ends: 144 [2020-11-29 20:13:57,769 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 20:13:57,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:13:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 20:13:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-11-29 20:13:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 20:13:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 20:13:57,772 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 20:13:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:57,772 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 20:13:57,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:13:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 20:13:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:13:57,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:57,773 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:57,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:13:57,976 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -498487510, now seen corresponding path program 45 times [2020-11-29 20:13:57,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:57,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910725726] [2020-11-29 20:13:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:58,176 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 20:13:58,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910725726] [2020-11-29 20:13:58,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537370819] [2020-11-29 20:13:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:58,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-29 20:13:58,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:13:58,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:58,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:13:58,308 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 20:13:58,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:58,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 20:13:58,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221037053] [2020-11-29 20:13:58,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 20:13:58,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 20:13:58,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:58,309 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-29 20:13:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:59,175 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-11-29 20:13:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 20:13:59,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 20:13:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:59,176 INFO L225 Difference]: With dead ends: 128 [2020-11-29 20:13:59,176 INFO L226 Difference]: Without dead ends: 119 [2020-11-29 20:13:59,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 20:13:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-29 20:13:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-11-29 20:13:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 20:13:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 163 transitions. [2020-11-29 20:13:59,180 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 163 transitions. Word has length 24 [2020-11-29 20:13:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:59,180 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 163 transitions. [2020-11-29 20:13:59,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 20:13:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 163 transitions. [2020-11-29 20:13:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:13:59,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:59,181 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:59,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 20:13:59,392 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1673116500, now seen corresponding path program 46 times [2020-11-29 20:13:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:59,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939232932] [2020-11-29 20:13:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:59,593 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 20:13:59,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939232932] [2020-11-29 20:13:59,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339329710] [2020-11-29 20:13:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:13:59,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:13:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:13:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:13:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:59,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:13:59,716 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 20:13:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:13:59,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 20:13:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241616117] [2020-11-29 20:13:59,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 20:13:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 20:13:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:13:59,717 INFO L87 Difference]: Start difference. First operand 67 states and 163 transitions. Second operand 21 states. [2020-11-29 20:14:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:00,499 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 20:14:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 20:14:00,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 20:14:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:00,500 INFO L225 Difference]: With dead ends: 123 [2020-11-29 20:14:00,500 INFO L226 Difference]: Without dead ends: 118 [2020-11-29 20:14:00,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 20:14:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-29 20:14:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-11-29 20:14:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 20:14:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-29 20:14:00,503 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-29 20:14:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:00,503 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-29 20:14:00,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 20:14:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-29 20:14:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 20:14:00,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:00,504 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:00,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:00,712 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1726781863, now seen corresponding path program 47 times [2020-11-29 20:14:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:00,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794869129] [2020-11-29 20:14:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:00,907 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 20:14:00,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794869129] [2020-11-29 20:14:00,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088183854] [2020-11-29 20:14:00,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:00,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 20:14:00,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:00,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 20:14:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:01,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:01,025 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 20:14:01,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:01,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 20:14:01,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186693759] [2020-11-29 20:14:01,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:14:01,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:14:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:14:01,026 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-29 20:14:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:01,852 INFO L93 Difference]: Finished difference Result 111 states and 271 transitions. [2020-11-29 20:14:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 20:14:01,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 20:14:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:01,853 INFO L225 Difference]: With dead ends: 111 [2020-11-29 20:14:01,854 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 20:14:01,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 20:14:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 20:14:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2020-11-29 20:14:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 20:14:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-11-29 20:14:01,857 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-11-29 20:14:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:01,857 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-11-29 20:14:01,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:14:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-11-29 20:14:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 20:14:01,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:01,857 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:02,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-29 20:14:02,058 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:02,058 INFO L82 PathProgramCache]: Analyzing trace with hash -326981342, now seen corresponding path program 48 times [2020-11-29 20:14:02,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:02,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480729943] [2020-11-29 20:14:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:02,325 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 20:14:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480729943] [2020-11-29 20:14:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984789588] [2020-11-29 20:14:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:02,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 20:14:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:14:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:02,497 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 20:14:02,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:02,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 20:14:02,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471152257] [2020-11-29 20:14:02,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:14:02,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:14:02,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:14:02,498 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 22 states. [2020-11-29 20:14:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:03,364 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 20:14:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 20:14:03,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 20:14:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:03,365 INFO L225 Difference]: With dead ends: 133 [2020-11-29 20:14:03,365 INFO L226 Difference]: Without dead ends: 124 [2020-11-29 20:14:03,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 20:14:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-29 20:14:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-11-29 20:14:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 20:14:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-29 20:14:03,369 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-29 20:14:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-29 20:14:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:14:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-29 20:14:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:14:03,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:03,370 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:03,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 20:14:03,570 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash 791196415, now seen corresponding path program 49 times [2020-11-29 20:14:03,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:03,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285595757] [2020-11-29 20:14:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:03,834 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 20:14:03,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285595757] [2020-11-29 20:14:03,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467923389] [2020-11-29 20:14:03,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 20:14:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:03,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:03,929 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 20:14:03,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:03,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 20:14:03,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360180410] [2020-11-29 20:14:03,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:14:03,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:03,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:14:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:14:03,931 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-29 20:14:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:04,341 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-29 20:14:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:14:04,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 20:14:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:04,342 INFO L225 Difference]: With dead ends: 112 [2020-11-29 20:14:04,342 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 20:14:04,342 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 20:14:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 20:14:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-29 20:14:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 20:14:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 20:14:04,345 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 20:14:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:04,345 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 20:14:04,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:14:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 20:14:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:14:04,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:04,346 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:04,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:04,556 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2097198353, now seen corresponding path program 50 times [2020-11-29 20:14:04,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:04,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998391867] [2020-11-29 20:14:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:04,941 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 20:14:04,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998391867] [2020-11-29 20:14:04,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554320621] [2020-11-29 20:14:04,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:05,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:05,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:14:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:05,040 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 20:14:05,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:05,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 20:14:05,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865738194] [2020-11-29 20:14:05,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:14:05,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:14:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:14:05,042 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 22 states. [2020-11-29 20:14:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:05,444 INFO L93 Difference]: Finished difference Result 156 states and 359 transitions. [2020-11-29 20:14:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 20:14:05,445 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 20:14:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:05,446 INFO L225 Difference]: With dead ends: 156 [2020-11-29 20:14:05,446 INFO L226 Difference]: Without dead ends: 150 [2020-11-29 20:14:05,446 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 20:14:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-29 20:14:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-11-29 20:14:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 20:14:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 20:14:05,455 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 20:14:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:05,455 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 20:14:05,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:14:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 20:14:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:14:05,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:05,455 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:05,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-29 20:14:05,656 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:05,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1990652807, now seen corresponding path program 51 times [2020-11-29 20:14:05,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:05,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684591413] [2020-11-29 20:14:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:05,879 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 20:14:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684591413] [2020-11-29 20:14:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775919993] [2020-11-29 20:14:05,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:05,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 20:14:05,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:14:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:06,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:06,038 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 20:14:06,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:06,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 20:14:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544325725] [2020-11-29 20:14:06,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:14:06,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:14:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:14:06,039 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-29 20:14:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:07,017 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-11-29 20:14:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 20:14:07,017 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 20:14:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:07,018 INFO L225 Difference]: With dead ends: 138 [2020-11-29 20:14:07,018 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 20:14:07,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 20:14:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 20:14:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 71. [2020-11-29 20:14:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 20:14:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-11-29 20:14:07,020 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2020-11-29 20:14:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-11-29 20:14:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:14:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-11-29 20:14:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 20:14:07,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:07,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:07,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:07,224 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:07,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1546461521, now seen corresponding path program 52 times [2020-11-29 20:14:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853415015] [2020-11-29 20:14:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:07,531 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 20:14:07,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853415015] [2020-11-29 20:14:07,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48137782] [2020-11-29 20:14:07,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:07,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:14:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:07,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:07,663 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 20:14:07,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:07,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 20:14:07,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133596037] [2020-11-29 20:14:07,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:14:07,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:07,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:14:07,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:14:07,664 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2020-11-29 20:14:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:08,587 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 20:14:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 20:14:08,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 20:14:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:08,589 INFO L225 Difference]: With dead ends: 133 [2020-11-29 20:14:08,589 INFO L226 Difference]: Without dead ends: 128 [2020-11-29 20:14:08,589 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 20:14:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-29 20:14:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2020-11-29 20:14:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 20:14:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-29 20:14:08,591 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-29 20:14:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:08,591 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-29 20:14:08,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:14:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-29 20:14:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 20:14:08,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:08,592 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:08,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:08,792 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1580720362, now seen corresponding path program 53 times [2020-11-29 20:14:08,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:08,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349768169] [2020-11-29 20:14:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:09,026 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 20:14:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349768169] [2020-11-29 20:14:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226461899] [2020-11-29 20:14:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:09,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-29 20:14:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 20:14:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:09,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:09,139 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 20:14:09,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:09,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 20:14:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033079648] [2020-11-29 20:14:09,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:14:09,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:14:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:14:09,140 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-29 20:14:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:10,126 INFO L93 Difference]: Finished difference Result 119 states and 291 transitions. [2020-11-29 20:14:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 20:14:10,127 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 20:14:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:10,127 INFO L225 Difference]: With dead ends: 119 [2020-11-29 20:14:10,127 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 20:14:10,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 20:14:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 20:14:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2020-11-29 20:14:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 20:14:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-11-29 20:14:10,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-11-29 20:14:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:10,132 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-11-29 20:14:10,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:14:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-11-29 20:14:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 20:14:10,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:10,132 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:10,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-29 20:14:10,344 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash -695644289, now seen corresponding path program 54 times [2020-11-29 20:14:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644085405] [2020-11-29 20:14:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:10,647 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 20:14:10,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644085405] [2020-11-29 20:14:10,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531117466] [2020-11-29 20:14:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:10,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 20:14:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 20:14:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:10,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:10,778 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 20:14:10,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:10,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 20:14:10,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552299865] [2020-11-29 20:14:10,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:14:10,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:10,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:14:10,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:14:10,779 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 24 states. [2020-11-29 20:14:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:11,782 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-29 20:14:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 20:14:11,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 20:14:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:11,784 INFO L225 Difference]: With dead ends: 143 [2020-11-29 20:14:11,784 INFO L226 Difference]: Without dead ends: 134 [2020-11-29 20:14:11,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 20:14:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-29 20:14:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2020-11-29 20:14:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 20:14:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-29 20:14:11,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-29 20:14:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-29 20:14:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:14:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-29 20:14:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:14:11,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:11,787 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:11,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:11,988 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 130555458, now seen corresponding path program 55 times [2020-11-29 20:14:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:11,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863532500] [2020-11-29 20:14:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:12,300 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 20:14:12,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863532500] [2020-11-29 20:14:12,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316726589] [2020-11-29 20:14:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 20:14:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:12,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:12,387 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 20:14:12,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:12,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-29 20:14:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053856443] [2020-11-29 20:14:12,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:14:12,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:14:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:14:12,389 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-11-29 20:14:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:12,900 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-29 20:14:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 20:14:12,901 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-29 20:14:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:12,902 INFO L225 Difference]: With dead ends: 120 [2020-11-29 20:14:12,902 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 20:14:12,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:14:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 20:14:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-11-29 20:14:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:14:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-29 20:14:12,905 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-29 20:14:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:12,905 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-29 20:14:12,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:14:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-29 20:14:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:14:12,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:12,906 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:13,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-29 20:14:13,107 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:13,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1067943374, now seen corresponding path program 56 times [2020-11-29 20:14:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:13,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041125513] [2020-11-29 20:14:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:13,429 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 20:14:13,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041125513] [2020-11-29 20:14:13,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739323003] [2020-11-29 20:14:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:13,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:13,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:14:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:13,512 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 20:14:13,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:13,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-29 20:14:13,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107472756] [2020-11-29 20:14:13,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:14:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:14:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:14:13,514 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 24 states. [2020-11-29 20:14:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:13,989 INFO L93 Difference]: Finished difference Result 168 states and 387 transitions. [2020-11-29 20:14:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 20:14:13,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-29 20:14:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:13,990 INFO L225 Difference]: With dead ends: 168 [2020-11-29 20:14:13,990 INFO L226 Difference]: Without dead ends: 162 [2020-11-29 20:14:13,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:14:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-29 20:14:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 94. [2020-11-29 20:14:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:14:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-11-29 20:14:13,993 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-11-29 20:14:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-11-29 20:14:13,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:14:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-11-29 20:14:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:14:13,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:13,994 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:14,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-29 20:14:14,204 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1757713572, now seen corresponding path program 57 times [2020-11-29 20:14:14,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:14,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973134002] [2020-11-29 20:14:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:14,473 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 20:14:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973134002] [2020-11-29 20:14:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956502176] [2020-11-29 20:14:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:14,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 20:14:14,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:14,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:14:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:14,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:14,611 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 20:14:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 20:14:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256869860] [2020-11-29 20:14:14,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 20:14:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 20:14:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:14:14,612 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-11-29 20:14:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:15,994 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-11-29 20:14:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-29 20:14:15,994 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-29 20:14:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:15,995 INFO L225 Difference]: With dead ends: 148 [2020-11-29 20:14:15,995 INFO L226 Difference]: Without dead ends: 139 [2020-11-29 20:14:15,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 20:14:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-29 20:14:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 75. [2020-11-29 20:14:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 20:14:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 183 transitions. [2020-11-29 20:14:15,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 183 transitions. Word has length 28 [2020-11-29 20:14:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:15,998 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 183 transitions. [2020-11-29 20:14:15,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 20:14:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 183 transitions. [2020-11-29 20:14:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:14:15,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:15,999 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:16,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-29 20:14:16,199 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash -90110990, now seen corresponding path program 58 times [2020-11-29 20:14:16,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:16,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51771694] [2020-11-29 20:14:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:16,456 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 20:14:16,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51771694] [2020-11-29 20:14:16,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256183746] [2020-11-29 20:14:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:16,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:14:16,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:16,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:16,626 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 20:14:16,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:16,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 20:14:16,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63721494] [2020-11-29 20:14:16,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 20:14:16,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 20:14:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:14:16,627 INFO L87 Difference]: Start difference. First operand 75 states and 183 transitions. Second operand 25 states. [2020-11-29 20:14:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:17,705 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-29 20:14:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 20:14:17,706 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-29 20:14:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:17,707 INFO L225 Difference]: With dead ends: 143 [2020-11-29 20:14:17,707 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 20:14:17,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 20:14:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 20:14:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2020-11-29 20:14:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:14:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-11-29 20:14:17,711 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-11-29 20:14:17,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:17,711 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-11-29 20:14:17,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 20:14:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-11-29 20:14:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 20:14:17,711 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:17,711 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:17,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-29 20:14:17,912 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1345428627, now seen corresponding path program 59 times [2020-11-29 20:14:17,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:17,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605610511] [2020-11-29 20:14:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:18,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605610511] [2020-11-29 20:14:18,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685261909] [2020-11-29 20:14:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:18,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 20:14:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:18,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 20:14:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:18,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:18,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:18,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-29 20:14:18,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145552776] [2020-11-29 20:14:18,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:14:18,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:14:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:14:18,533 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-11-29 20:14:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:19,853 INFO L93 Difference]: Finished difference Result 127 states and 311 transitions. [2020-11-29 20:14:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 20:14:19,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-29 20:14:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:19,854 INFO L225 Difference]: With dead ends: 127 [2020-11-29 20:14:19,854 INFO L226 Difference]: Without dead ends: 122 [2020-11-29 20:14:19,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-11-29 20:14:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-29 20:14:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-11-29 20:14:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 20:14:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-11-29 20:14:19,856 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-11-29 20:14:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:19,856 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-11-29 20:14:19,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:14:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-11-29 20:14:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 20:14:19,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:19,857 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:20,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:20,064 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1501549212, now seen corresponding path program 60 times [2020-11-29 20:14:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995890816] [2020-11-29 20:14:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:20,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995890816] [2020-11-29 20:14:20,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867902407] [2020-11-29 20:14:20,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/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 20:14:20,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-29 20:14:20,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:20,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 20:14:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:20,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:20,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:20,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-29 20:14:20,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977153421] [2020-11-29 20:14:20,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:14:20,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:14:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:14:20,543 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 26 states. [2020-11-29 20:14:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:21,752 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-11-29 20:14:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-29 20:14:21,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-29 20:14:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:21,753 INFO L225 Difference]: With dead ends: 153 [2020-11-29 20:14:21,753 INFO L226 Difference]: Without dead ends: 144 [2020-11-29 20:14:21,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 20:14:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-29 20:14:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2020-11-29 20:14:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 20:14:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-29 20:14:21,755 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-29 20:14:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:21,756 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-29 20:14:21,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:14:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-29 20:14:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:14:21,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:21,760 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:21,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:21,976 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 909755589, now seen corresponding path program 61 times [2020-11-29 20:14:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299739129] [2020-11-29 20:14:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299739129] [2020-11-29 20:14:22,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102406706] [2020-11-29 20:14:22,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:14:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:22,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:22,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:22,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-29 20:14:22,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325165168] [2020-11-29 20:14:22,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:14:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:22,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:14:22,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:14:22,646 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-11-29 20:14:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:23,183 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-29 20:14:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 20:14:23,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-29 20:14:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:23,184 INFO L225 Difference]: With dead ends: 128 [2020-11-29 20:14:23,184 INFO L226 Difference]: Without dead ends: 122 [2020-11-29 20:14:23,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 20:14:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-29 20:14:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-11-29 20:14:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 20:14:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-11-29 20:14:23,187 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-11-29 20:14:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:23,188 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-11-29 20:14:23,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:14:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-11-29 20:14:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:14:23,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:23,188 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:23,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:23,389 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash 203613365, now seen corresponding path program 62 times [2020-11-29 20:14:23,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:23,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180761423] [2020-11-29 20:14:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180761423] [2020-11-29 20:14:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854411850] [2020-11-29 20:14:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:23,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 20:14:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:23,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:23,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-29 20:14:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465514514] [2020-11-29 20:14:23,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:14:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:14:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:14:23,930 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 26 states. [2020-11-29 20:14:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:24,517 INFO L93 Difference]: Finished difference Result 180 states and 415 transitions. [2020-11-29 20:14:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:14:24,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-29 20:14:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:24,518 INFO L225 Difference]: With dead ends: 180 [2020-11-29 20:14:24,519 INFO L226 Difference]: Without dead ends: 174 [2020-11-29 20:14:24,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 20:14:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-29 20:14:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 100. [2020-11-29 20:14:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 20:14:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-11-29 20:14:24,521 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-11-29 20:14:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:24,521 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-11-29 20:14:24,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:14:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-11-29 20:14:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:14:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:24,522 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:24,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-29 20:14:24,724 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1241408129, now seen corresponding path program 63 times [2020-11-29 20:14:24,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:24,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172337341] [2020-11-29 20:14:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:25,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172337341] [2020-11-29 20:14:25,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749888424] [2020-11-29 20:14:25,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:25,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-29 20:14:25,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:25,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:14:25,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:25,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-29 20:14:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029410584] [2020-11-29 20:14:25,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 20:14:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 20:14:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:14:25,173 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 27 states. [2020-11-29 20:14:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:26,313 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-11-29 20:14:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-29 20:14:26,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-29 20:14:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:26,315 INFO L225 Difference]: With dead ends: 158 [2020-11-29 20:14:26,315 INFO L226 Difference]: Without dead ends: 149 [2020-11-29 20:14:26,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2020-11-29 20:14:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-29 20:14:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 79. [2020-11-29 20:14:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 20:14:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 193 transitions. [2020-11-29 20:14:26,318 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 193 transitions. Word has length 30 [2020-11-29 20:14:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:26,319 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 193 transitions. [2020-11-29 20:14:26,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 20:14:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 193 transitions. [2020-11-29 20:14:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:14:26,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:26,319 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:26,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:26,528 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:26,529 INFO L82 PathProgramCache]: Analyzing trace with hash -696589195, now seen corresponding path program 64 times [2020-11-29 20:14:26,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:26,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852609386] [2020-11-29 20:14:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852609386] [2020-11-29 20:14:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639765072] [2020-11-29 20:14:26,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:26,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 20:14:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:26,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:26,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:26,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-29 20:14:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977994418] [2020-11-29 20:14:26,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 20:14:26,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:26,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 20:14:26,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:14:26,965 INFO L87 Difference]: Start difference. First operand 79 states and 193 transitions. Second operand 27 states. [2020-11-29 20:14:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:28,135 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-11-29 20:14:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 20:14:28,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-29 20:14:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:28,145 INFO L225 Difference]: With dead ends: 153 [2020-11-29 20:14:28,146 INFO L226 Difference]: Without dead ends: 148 [2020-11-29 20:14:28,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-11-29 20:14:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-29 20:14:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2020-11-29 20:14:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 20:14:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-11-29 20:14:28,149 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 30 [2020-11-29 20:14:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-11-29 20:14:28,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 20:14:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-11-29 20:14:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:14:28,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:28,150 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-29 20:14:28,364 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -171028176, now seen corresponding path program 65 times [2020-11-29 20:14:28,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:28,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668734348] [2020-11-29 20:14:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668734348] [2020-11-29 20:14:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971024603] [2020-11-29 20:14:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:28,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 20:14:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:28,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:14:28,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:28,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-29 20:14:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327665422] [2020-11-29 20:14:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:14:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:14:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:14:28,780 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-11-29 20:14:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:30,033 INFO L93 Difference]: Finished difference Result 135 states and 331 transitions. [2020-11-29 20:14:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 20:14:30,034 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-29 20:14:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:30,035 INFO L225 Difference]: With dead ends: 135 [2020-11-29 20:14:30,035 INFO L226 Difference]: Without dead ends: 130 [2020-11-29 20:14:30,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 20:14:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-29 20:14:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2020-11-29 20:14:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:14:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-11-29 20:14:30,037 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-11-29 20:14:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-11-29 20:14:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:14:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-11-29 20:14:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 20:14:30,037 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:30,037 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:30,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:30,238 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -119405959, now seen corresponding path program 66 times [2020-11-29 20:14:30,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:30,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573536429] [2020-11-29 20:14:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573536429] [2020-11-29 20:14:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088602076] [2020-11-29 20:14:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:30,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-29 20:14:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 20:14:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:30,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:30,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:30,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-29 20:14:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511248238] [2020-11-29 20:14:30,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:14:30,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:30,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:14:30,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:14:30,715 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 28 states. [2020-11-29 20:14:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:32,016 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-11-29 20:14:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-29 20:14:32,017 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-29 20:14:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:32,018 INFO L225 Difference]: With dead ends: 163 [2020-11-29 20:14:32,018 INFO L226 Difference]: Without dead ends: 154 [2020-11-29 20:14:32,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 20:14:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-29 20:14:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 103. [2020-11-29 20:14:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 20:14:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-29 20:14:32,022 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-29 20:14:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:32,023 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-29 20:14:32,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:14:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-29 20:14:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:14:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:32,024 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:32,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-29 20:14:32,244 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1898195320, now seen corresponding path program 67 times [2020-11-29 20:14:32,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:32,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102334895] [2020-11-29 20:14:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:32,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102334895] [2020-11-29 20:14:32,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159412319] [2020-11-29 20:14:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 20:14:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:32,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:32,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-29 20:14:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348441631] [2020-11-29 20:14:32,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:14:32,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:14:32,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:14:32,776 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-11-29 20:14:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:33,454 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-29 20:14:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-29 20:14:33,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-29 20:14:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:33,455 INFO L225 Difference]: With dead ends: 136 [2020-11-29 20:14:33,455 INFO L226 Difference]: Without dead ends: 130 [2020-11-29 20:14:33,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1859, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 20:14:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-29 20:14:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-11-29 20:14:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 20:14:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-11-29 20:14:33,457 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-11-29 20:14:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:33,458 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-11-29 20:14:33,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:14:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-11-29 20:14:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:14:33,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:33,458 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:33,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:33,659 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1896039816, now seen corresponding path program 68 times [2020-11-29 20:14:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:33,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92395049] [2020-11-29 20:14:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:34,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92395049] [2020-11-29 20:14:34,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667186041] [2020-11-29 20:14:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:34,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:14:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:34,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:34,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-29 20:14:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315263179] [2020-11-29 20:14:34,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:14:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:14:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:14:34,145 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 28 states. [2020-11-29 20:14:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:34,790 INFO L93 Difference]: Finished difference Result 192 states and 443 transitions. [2020-11-29 20:14:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 20:14:34,790 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-29 20:14:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:34,791 INFO L225 Difference]: With dead ends: 192 [2020-11-29 20:14:34,791 INFO L226 Difference]: Without dead ends: 186 [2020-11-29 20:14:34,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 20:14:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-29 20:14:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2020-11-29 20:14:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 20:14:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-11-29 20:14:34,794 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-11-29 20:14:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:34,794 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-11-29 20:14:34,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:14:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-11-29 20:14:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:14:34,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:34,794 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:34,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-29 20:14:34,995 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1006883554, now seen corresponding path program 69 times [2020-11-29 20:14:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:34,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797469598] [2020-11-29 20:14:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:35,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797469598] [2020-11-29 20:14:35,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657652731] [2020-11-29 20:14:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:35,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-29 20:14:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 20:14:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:35,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:35,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-29 20:14:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846979363] [2020-11-29 20:14:35,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 20:14:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 20:14:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-11-29 20:14:35,491 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 29 states. [2020-11-29 20:14:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:37,056 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-11-29 20:14:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-29 20:14:37,062 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-29 20:14:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:37,063 INFO L225 Difference]: With dead ends: 168 [2020-11-29 20:14:37,063 INFO L226 Difference]: Without dead ends: 159 [2020-11-29 20:14:37,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1572, Invalid=4128, Unknown=0, NotChecked=0, Total=5700 [2020-11-29 20:14:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-29 20:14:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 83. [2020-11-29 20:14:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 20:14:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 203 transitions. [2020-11-29 20:14:37,065 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 203 transitions. Word has length 32 [2020-11-29 20:14:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:37,065 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 203 transitions. [2020-11-29 20:14:37,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 20:14:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 203 transitions. [2020-11-29 20:14:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 20:14:37,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:37,066 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:37,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-29 20:14:37,266 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 593408056, now seen corresponding path program 70 times [2020-11-29 20:14:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:37,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632039916] [2020-11-29 20:14:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:37,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632039916] [2020-11-29 20:14:37,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463858736] [2020-11-29 20:14:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:37,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:14:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:37,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:37,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:37,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-29 20:14:37,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098920134] [2020-11-29 20:14:37,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 20:14:37,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:37,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 20:14:37,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-29 20:14:37,763 INFO L87 Difference]: Start difference. First operand 83 states and 203 transitions. Second operand 29 states. [2020-11-29 20:14:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:39,266 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-11-29 20:14:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 20:14:39,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-29 20:14:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:39,268 INFO L225 Difference]: With dead ends: 163 [2020-11-29 20:14:39,268 INFO L226 Difference]: Without dead ends: 158 [2020-11-29 20:14:39,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-11-29 20:14:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-29 20:14:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 107. [2020-11-29 20:14:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 20:14:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-11-29 20:14:39,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 32 [2020-11-29 20:14:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:39,270 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-11-29 20:14:39,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 20:14:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-11-29 20:14:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 20:14:39,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:39,271 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:39,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:39,472 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:39,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1148593613, now seen corresponding path program 71 times [2020-11-29 20:14:39,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:39,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662294734] [2020-11-29 20:14:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:39,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662294734] [2020-11-29 20:14:39,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311687884] [2020-11-29 20:14:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:40,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-29 20:14:40,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:40,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 20:14:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:40,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:40,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:40,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-29 20:14:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876704178] [2020-11-29 20:14:40,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 20:14:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 20:14:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:14:40,174 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-11-29 20:14:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:42,104 INFO L93 Difference]: Finished difference Result 143 states and 351 transitions. [2020-11-29 20:14:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 20:14:42,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-29 20:14:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:42,106 INFO L225 Difference]: With dead ends: 143 [2020-11-29 20:14:42,106 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 20:14:42,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-11-29 20:14:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 20:14:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2020-11-29 20:14:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 20:14:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-11-29 20:14:42,108 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-11-29 20:14:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:42,108 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-11-29 20:14:42,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 20:14:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-11-29 20:14:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 20:14:42,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:42,113 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:42,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:42,318 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1215803158, now seen corresponding path program 72 times [2020-11-29 20:14:42,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:42,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226708403] [2020-11-29 20:14:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:42,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226708403] [2020-11-29 20:14:42,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015201485] [2020-11-29 20:14:42,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:42,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 20:14:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-29 20:14:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:42,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:42,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:42,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-29 20:14:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186435484] [2020-11-29 20:14:42,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 20:14:42,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 20:14:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:14:42,805 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 30 states. [2020-11-29 20:14:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:44,434 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-11-29 20:14:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-29 20:14:44,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-29 20:14:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:44,435 INFO L225 Difference]: With dead ends: 173 [2020-11-29 20:14:44,436 INFO L226 Difference]: Without dead ends: 164 [2020-11-29 20:14:44,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 20:14:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-29 20:14:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 109. [2020-11-29 20:14:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 20:14:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-29 20:14:44,438 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-29 20:14:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:44,438 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-29 20:14:44,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 20:14:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-29 20:14:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:14:44,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:44,439 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:44,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-29 20:14:44,639 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1195410315, now seen corresponding path program 73 times [2020-11-29 20:14:44,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:44,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974152678] [2020-11-29 20:14:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:45,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974152678] [2020-11-29 20:14:45,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686301414] [2020-11-29 20:14:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:14:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:45,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:45,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-29 20:14:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276830907] [2020-11-29 20:14:45,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 20:14:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 20:14:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:14:45,195 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-11-29 20:14:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:45,942 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-29 20:14:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 20:14:45,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-29 20:14:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:45,943 INFO L225 Difference]: With dead ends: 144 [2020-11-29 20:14:45,943 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 20:14:45,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 20:14:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 20:14:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-11-29 20:14:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 20:14:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-11-29 20:14:45,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-11-29 20:14:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:45,946 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-11-29 20:14:45,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 20:14:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-11-29 20:14:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:14:45,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:45,946 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:46,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:46,147 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1028117637, now seen corresponding path program 74 times [2020-11-29 20:14:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:46,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038151010] [2020-11-29 20:14:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:46,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038151010] [2020-11-29 20:14:46,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057167362] [2020-11-29 20:14:46,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:46,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:14:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:14:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:46,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:46,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-29 20:14:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33560566] [2020-11-29 20:14:46,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 20:14:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 20:14:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:14:46,743 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 30 states. [2020-11-29 20:14:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:47,427 INFO L93 Difference]: Finished difference Result 204 states and 471 transitions. [2020-11-29 20:14:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 20:14:47,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-29 20:14:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:47,428 INFO L225 Difference]: With dead ends: 204 [2020-11-29 20:14:47,429 INFO L226 Difference]: Without dead ends: 198 [2020-11-29 20:14:47,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 20:14:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-29 20:14:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 112. [2020-11-29 20:14:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 20:14:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-11-29 20:14:47,432 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-11-29 20:14:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:47,432 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-11-29 20:14:47,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 20:14:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-11-29 20:14:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:14:47,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:47,433 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:47,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-29 20:14:47,648 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1246641029, now seen corresponding path program 75 times [2020-11-29 20:14:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:47,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909971234] [2020-11-29 20:14:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:48,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909971234] [2020-11-29 20:14:48,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874189448] [2020-11-29 20:14:48,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:48,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-29 20:14:48,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:14:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:48,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:14:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:48,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:48,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-29 20:14:48,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548249754] [2020-11-29 20:14:48,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-29 20:14:48,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-29 20:14:48,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-11-29 20:14:48,172 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 31 states. [2020-11-29 20:14:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:49,889 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-11-29 20:14:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-29 20:14:49,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-29 20:14:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:49,891 INFO L225 Difference]: With dead ends: 178 [2020-11-29 20:14:49,891 INFO L226 Difference]: Without dead ends: 169 [2020-11-29 20:14:49,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2162, Invalid=4810, Unknown=0, NotChecked=0, Total=6972 [2020-11-29 20:14:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-29 20:14:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 87. [2020-11-29 20:14:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 20:14:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 213 transitions. [2020-11-29 20:14:49,894 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 213 transitions. Word has length 34 [2020-11-29 20:14:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:49,894 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 213 transitions. [2020-11-29 20:14:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-29 20:14:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 213 transitions. [2020-11-29 20:14:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:14:49,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:49,895 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:50,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:50,108 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash -964782277, now seen corresponding path program 76 times [2020-11-29 20:14:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111215635] [2020-11-29 20:14:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:50,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111215635] [2020-11-29 20:14:50,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184784452] [2020-11-29 20:14:50,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:50,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:14:50,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:50,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:14:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:50,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:50,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:50,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-29 20:14:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011023052] [2020-11-29 20:14:50,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-29 20:14:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-29 20:14:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-29 20:14:50,665 INFO L87 Difference]: Start difference. First operand 87 states and 213 transitions. Second operand 31 states. [2020-11-29 20:14:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:52,273 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-11-29 20:14:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-29 20:14:52,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-29 20:14:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:52,274 INFO L225 Difference]: With dead ends: 173 [2020-11-29 20:14:52,274 INFO L226 Difference]: Without dead ends: 168 [2020-11-29 20:14:52,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-11-29 20:14:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-29 20:14:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 113. [2020-11-29 20:14:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-29 20:14:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-11-29 20:14:52,277 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 34 [2020-11-29 20:14:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:52,277 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-11-29 20:14:52,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-29 20:14:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-11-29 20:14:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 20:14:52,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:52,278 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:52,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-29 20:14:52,488 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:52,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash 8859254, now seen corresponding path program 77 times [2020-11-29 20:14:52,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:52,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127035557] [2020-11-29 20:14:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:52,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127035557] [2020-11-29 20:14:52,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324633384] [2020-11-29 20:14:52,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:52,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-29 20:14:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:14:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:53,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:53,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:53,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-29 20:14:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792585533] [2020-11-29 20:14:53,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 20:14:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 20:14:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-29 20:14:53,050 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-11-29 20:14:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:54,865 INFO L93 Difference]: Finished difference Result 151 states and 371 transitions. [2020-11-29 20:14:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-29 20:14:54,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-29 20:14:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:54,866 INFO L225 Difference]: With dead ends: 151 [2020-11-29 20:14:54,866 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 20:14:54,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 20:14:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 20:14:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-11-29 20:14:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 20:14:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2020-11-29 20:14:54,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 35 [2020-11-29 20:14:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:54,869 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2020-11-29 20:14:54,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 20:14:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2020-11-29 20:14:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 20:14:54,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:54,870 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:55,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:55,070 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 156543091, now seen corresponding path program 78 times [2020-11-29 20:14:55,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:55,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002024995] [2020-11-29 20:14:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:55,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002024995] [2020-11-29 20:14:55,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889295894] [2020-11-29 20:14:55,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:55,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-29 20:14:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:14:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:14:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:55,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:55,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-29 20:14:55,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888807277] [2020-11-29 20:14:55,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 20:14:55,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:55,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 20:14:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-11-29 20:14:55,656 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand 32 states. [2020-11-29 20:14:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:57,401 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-29 20:14:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-29 20:14:57,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-29 20:14:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:57,403 INFO L225 Difference]: With dead ends: 183 [2020-11-29 20:14:57,403 INFO L226 Difference]: Without dead ends: 174 [2020-11-29 20:14:57,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=5402, Unknown=0, NotChecked=0, Total=7482 [2020-11-29 20:14:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-11-29 20:14:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 115. [2020-11-29 20:14:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-29 20:14:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-29 20:14:57,406 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-29 20:14:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:57,407 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-29 20:14:57,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 20:14:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-29 20:14:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:14:57,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:57,407 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:57,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-29 20:14:57,608 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2033056718, now seen corresponding path program 79 times [2020-11-29 20:14:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:57,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901284836] [2020-11-29 20:14:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901284836] [2020-11-29 20:14:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035522010] [2020-11-29 20:14:58,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:14:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 20:14:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:14:58,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:14:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:14:58,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:14:58,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-29 20:14:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055225191] [2020-11-29 20:14:58,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 20:14:58,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:14:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 20:14:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-29 20:14:58,272 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-11-29 20:14:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:14:59,119 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-29 20:14:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 20:14:59,120 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-29 20:14:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:14:59,121 INFO L225 Difference]: With dead ends: 152 [2020-11-29 20:14:59,121 INFO L226 Difference]: Without dead ends: 146 [2020-11-29 20:14:59,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 20:14:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-29 20:14:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2020-11-29 20:14:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-29 20:14:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-11-29 20:14:59,123 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-11-29 20:14:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:14:59,123 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-11-29 20:14:59,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 20:14:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-11-29 20:14:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:14:59,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:14:59,124 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:14:59,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:14:59,336 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:14:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:14:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash -178559042, now seen corresponding path program 80 times [2020-11-29 20:14:59,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:14:59,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061973544] [2020-11-29 20:14:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:14:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061973544] [2020-11-29 20:15:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547940016] [2020-11-29 20:15:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:00,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:15:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:15:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:00,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:00,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-29 20:15:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644747472] [2020-11-29 20:15:00,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 20:15:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 20:15:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-11-29 20:15:00,151 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 32 states. [2020-11-29 20:15:01,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:01,048 INFO L93 Difference]: Finished difference Result 216 states and 499 transitions. [2020-11-29 20:15:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 20:15:01,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-29 20:15:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:01,049 INFO L225 Difference]: With dead ends: 216 [2020-11-29 20:15:01,050 INFO L226 Difference]: Without dead ends: 210 [2020-11-29 20:15:01,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1119, Invalid=2541, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 20:15:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-11-29 20:15:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 118. [2020-11-29 20:15:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-29 20:15:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-11-29 20:15:01,052 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-11-29 20:15:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:01,052 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-11-29 20:15:01,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 20:15:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-11-29 20:15:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:15:01,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:01,056 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:01,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:01,264 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 274659480, now seen corresponding path program 81 times [2020-11-29 20:15:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:01,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565107244] [2020-11-29 20:15:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565107244] [2020-11-29 20:15:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914973559] [2020-11-29 20:15:01,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-29 20:15:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:15:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:01,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:15:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:01,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:01,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-29 20:15:01,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744255539] [2020-11-29 20:15:01,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 20:15:01,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 20:15:01,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:15:01,868 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 33 states. [2020-11-29 20:15:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:03,914 INFO L93 Difference]: Finished difference Result 188 states and 447 transitions. [2020-11-29 20:15:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-29 20:15:03,915 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-29 20:15:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:03,916 INFO L225 Difference]: With dead ends: 188 [2020-11-29 20:15:03,916 INFO L226 Difference]: Without dead ends: 179 [2020-11-29 20:15:03,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2481, Invalid=5529, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 20:15:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-29 20:15:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 91. [2020-11-29 20:15:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 20:15:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 223 transitions. [2020-11-29 20:15:03,918 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 223 transitions. Word has length 36 [2020-11-29 20:15:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:03,918 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 223 transitions. [2020-11-29 20:15:03,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 20:15:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 223 transitions. [2020-11-29 20:15:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 20:15:03,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:03,919 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:04,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:04,119 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:04,120 INFO L82 PathProgramCache]: Analyzing trace with hash 557894014, now seen corresponding path program 82 times [2020-11-29 20:15:04,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:04,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281106058] [2020-11-29 20:15:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281106058] [2020-11-29 20:15:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477497292] [2020-11-29 20:15:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:04,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:15:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:15:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:04,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:04,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:04,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-29 20:15:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120984728] [2020-11-29 20:15:04,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 20:15:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 20:15:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:15:04,688 INFO L87 Difference]: Start difference. First operand 91 states and 223 transitions. Second operand 33 states. [2020-11-29 20:15:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:06,553 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-29 20:15:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-29 20:15:06,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-29 20:15:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:06,555 INFO L225 Difference]: With dead ends: 183 [2020-11-29 20:15:06,555 INFO L226 Difference]: Without dead ends: 178 [2020-11-29 20:15:06,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 20:15:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-29 20:15:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 119. [2020-11-29 20:15:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-29 20:15:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 307 transitions. [2020-11-29 20:15:06,558 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 307 transitions. Word has length 36 [2020-11-29 20:15:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:06,559 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 307 transitions. [2020-11-29 20:15:06,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 20:15:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 307 transitions. [2020-11-29 20:15:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 20:15:06,560 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:06,560 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:06,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:06,776 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash -75465223, now seen corresponding path program 83 times [2020-11-29 20:15:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:06,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218120311] [2020-11-29 20:15:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218120311] [2020-11-29 20:15:07,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37487696] [2020-11-29 20:15:07,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:07,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-29 20:15:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 20:15:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:07,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:07,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:07,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-29 20:15:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085332750] [2020-11-29 20:15:07,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 20:15:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 20:15:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:15:07,361 INFO L87 Difference]: Start difference. First operand 119 states and 307 transitions. Second operand 34 states. [2020-11-29 20:15:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:09,415 INFO L93 Difference]: Finished difference Result 159 states and 391 transitions. [2020-11-29 20:15:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-29 20:15:09,415 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-29 20:15:09,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:09,416 INFO L225 Difference]: With dead ends: 159 [2020-11-29 20:15:09,416 INFO L226 Difference]: Without dead ends: 154 [2020-11-29 20:15:09,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2020-11-29 20:15:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-29 20:15:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 92. [2020-11-29 20:15:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 20:15:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 227 transitions. [2020-11-29 20:15:09,419 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 227 transitions. Word has length 37 [2020-11-29 20:15:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:09,419 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 227 transitions. [2020-11-29 20:15:09,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 20:15:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 227 transitions. [2020-11-29 20:15:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 20:15:09,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:09,420 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:09,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:09,628 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 114867856, now seen corresponding path program 84 times [2020-11-29 20:15:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:09,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159062777] [2020-11-29 20:15:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:10,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159062777] [2020-11-29 20:15:10,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442198143] [2020-11-29 20:15:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:10,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-29 20:15:10,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-29 20:15:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:10,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:15:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:10,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:10,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-29 20:15:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382433723] [2020-11-29 20:15:10,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 20:15:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 20:15:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:15:10,277 INFO L87 Difference]: Start difference. First operand 92 states and 227 transitions. Second operand 34 states. [2020-11-29 20:15:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:12,287 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-11-29 20:15:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-29 20:15:12,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-29 20:15:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:12,289 INFO L225 Difference]: With dead ends: 193 [2020-11-29 20:15:12,289 INFO L226 Difference]: Without dead ends: 184 [2020-11-29 20:15:12,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2647, Invalid=5909, Unknown=0, NotChecked=0, Total=8556 [2020-11-29 20:15:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-29 20:15:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2020-11-29 20:15:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-29 20:15:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-29 20:15:12,293 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-29 20:15:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:12,293 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-29 20:15:12,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 20:15:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-29 20:15:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:15:12,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:12,294 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:12,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:12,504 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash -442601647, now seen corresponding path program 85 times [2020-11-29 20:15:12,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:12,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593056293] [2020-11-29 20:15:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593056293] [2020-11-29 20:15:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957964370] [2020-11-29 20:15:13,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 20:15:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:13,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:13,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:13,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-29 20:15:13,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646050198] [2020-11-29 20:15:13,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 20:15:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 20:15:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:15:13,228 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 34 states. [2020-11-29 20:15:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:14,295 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-29 20:15:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 20:15:14,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-29 20:15:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:14,297 INFO L225 Difference]: With dead ends: 160 [2020-11-29 20:15:14,297 INFO L226 Difference]: Without dead ends: 154 [2020-11-29 20:15:14,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1344, Invalid=2816, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 20:15:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-29 20:15:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-11-29 20:15:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-29 20:15:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-11-29 20:15:14,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-11-29 20:15:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:14,299 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-11-29 20:15:14,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 20:15:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-11-29 20:15:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:15:14,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:14,300 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:14,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:14,500 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 203464513, now seen corresponding path program 86 times [2020-11-29 20:15:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3633232] [2020-11-29 20:15:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:15,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3633232] [2020-11-29 20:15:15,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759743538] [2020-11-29 20:15:15,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:15,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:15:15,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:15,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 20:15:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-29 20:15:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258816472] [2020-11-29 20:15:15,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-29 20:15:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-29 20:15:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:15:15,254 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 34 states. [2020-11-29 20:15:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:16,246 INFO L93 Difference]: Finished difference Result 228 states and 527 transitions. [2020-11-29 20:15:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 20:15:16,247 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-29 20:15:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:16,248 INFO L225 Difference]: With dead ends: 228 [2020-11-29 20:15:16,248 INFO L226 Difference]: Without dead ends: 222 [2020-11-29 20:15:16,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1273, Invalid=2887, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 20:15:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-11-29 20:15:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 124. [2020-11-29 20:15:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-29 20:15:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-11-29 20:15:16,252 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-11-29 20:15:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:16,252 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-11-29 20:15:16,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-29 20:15:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-11-29 20:15:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:15:16,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:16,254 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:16,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-29 20:15:16,464 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1955567989, now seen corresponding path program 87 times [2020-11-29 20:15:16,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924160745] [2020-11-29 20:15:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:17,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924160745] [2020-11-29 20:15:17,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449756058] [2020-11-29 20:15:17,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:17,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-29 20:15:17,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 20:15:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:17,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:17,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-29 20:15:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028643080] [2020-11-29 20:15:17,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-29 20:15:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-29 20:15:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 20:15:17,259 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 35 states. [2020-11-29 20:15:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:19,329 INFO L93 Difference]: Finished difference Result 198 states and 471 transitions. [2020-11-29 20:15:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-29 20:15:19,330 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-29 20:15:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:19,331 INFO L225 Difference]: With dead ends: 198 [2020-11-29 20:15:19,331 INFO L226 Difference]: Without dead ends: 189 [2020-11-29 20:15:19,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2391, Invalid=6351, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 20:15:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-29 20:15:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 95. [2020-11-29 20:15:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-29 20:15:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-11-29 20:15:19,334 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 38 [2020-11-29 20:15:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-11-29 20:15:19,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-29 20:15:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-11-29 20:15:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:15:19,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:19,334 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:19,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:19,535 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash -734038271, now seen corresponding path program 88 times [2020-11-29 20:15:19,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:19,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350983530] [2020-11-29 20:15:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:20,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350983530] [2020-11-29 20:15:20,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813867711] [2020-11-29 20:15:20,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:20,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:15:20,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 20:15:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:20,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:20,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:20,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-29 20:15:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53255370] [2020-11-29 20:15:20,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-29 20:15:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-29 20:15:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 20:15:20,301 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 35 states. [2020-11-29 20:15:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:22,482 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-11-29 20:15:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-29 20:15:22,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-29 20:15:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:22,484 INFO L225 Difference]: With dead ends: 193 [2020-11-29 20:15:22,484 INFO L226 Difference]: Without dead ends: 188 [2020-11-29 20:15:22,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2905, Invalid=6215, Unknown=0, NotChecked=0, Total=9120 [2020-11-29 20:15:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-29 20:15:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 125. [2020-11-29 20:15:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 20:15:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 323 transitions. [2020-11-29 20:15:22,487 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 323 transitions. Word has length 38 [2020-11-29 20:15:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:22,487 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 323 transitions. [2020-11-29 20:15:22,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-29 20:15:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 323 transitions. [2020-11-29 20:15:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 20:15:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:22,488 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:22,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-29 20:15:22,688 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 493091004, now seen corresponding path program 89 times [2020-11-29 20:15:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:22,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70693898] [2020-11-29 20:15:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:23,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70693898] [2020-11-29 20:15:23,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913027971] [2020-11-29 20:15:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:23,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-29 20:15:23,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:23,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 20:15:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:23,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:23,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:23,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-29 20:15:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155373341] [2020-11-29 20:15:23,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 20:15:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 20:15:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:15:23,418 INFO L87 Difference]: Start difference. First operand 125 states and 323 transitions. Second operand 36 states. [2020-11-29 20:15:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:25,752 INFO L93 Difference]: Finished difference Result 167 states and 411 transitions. [2020-11-29 20:15:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-29 20:15:25,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-29 20:15:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:25,754 INFO L225 Difference]: With dead ends: 167 [2020-11-29 20:15:25,754 INFO L226 Difference]: Without dead ends: 162 [2020-11-29 20:15:25,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 20:15:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-29 20:15:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2020-11-29 20:15:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 20:15:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 237 transitions. [2020-11-29 20:15:25,756 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 237 transitions. Word has length 39 [2020-11-29 20:15:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:25,757 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 237 transitions. [2020-11-29 20:15:25,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 20:15:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 237 transitions. [2020-11-29 20:15:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 20:15:25,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:25,757 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:25,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:25,958 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1280327315, now seen corresponding path program 90 times [2020-11-29 20:15:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967571151] [2020-11-29 20:15:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:26,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967571151] [2020-11-29 20:15:26,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114568180] [2020-11-29 20:15:26,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:26,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-11-29 20:15:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 20:15:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:26,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:15:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:26,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:26,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-29 20:15:26,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289433743] [2020-11-29 20:15:26,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 20:15:26,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 20:15:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:15:26,699 INFO L87 Difference]: Start difference. First operand 96 states and 237 transitions. Second operand 36 states. [2020-11-29 20:15:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:29,092 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-29 20:15:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-29 20:15:29,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-29 20:15:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:29,094 INFO L225 Difference]: With dead ends: 203 [2020-11-29 20:15:29,094 INFO L226 Difference]: Without dead ends: 194 [2020-11-29 20:15:29,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2999, Invalid=6703, Unknown=0, NotChecked=0, Total=9702 [2020-11-29 20:15:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-29 20:15:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 127. [2020-11-29 20:15:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-29 20:15:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-29 20:15:29,097 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-29 20:15:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-29 20:15:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 20:15:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-29 20:15:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:15:29,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:29,097 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:29,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:29,300 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -138408428, now seen corresponding path program 91 times [2020-11-29 20:15:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:29,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80571417] [2020-11-29 20:15:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:30,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80571417] [2020-11-29 20:15:30,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470020484] [2020-11-29 20:15:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 20:15:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:30,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:30,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:30,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-29 20:15:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825364159] [2020-11-29 20:15:30,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 20:15:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 20:15:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:15:30,251 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 36 states. [2020-11-29 20:15:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:31,528 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-29 20:15:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 20:15:31,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-29 20:15:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:31,530 INFO L225 Difference]: With dead ends: 168 [2020-11-29 20:15:31,530 INFO L226 Difference]: Without dead ends: 162 [2020-11-29 20:15:31,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 20:15:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-29 20:15:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-11-29 20:15:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-29 20:15:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-11-29 20:15:31,533 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-11-29 20:15:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:31,533 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-11-29 20:15:31,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 20:15:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-11-29 20:15:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:15:31,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:31,534 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:31,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:31,736 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2039086588, now seen corresponding path program 92 times [2020-11-29 20:15:31,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:31,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352154112] [2020-11-29 20:15:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:32,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352154112] [2020-11-29 20:15:32,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368247681] [2020-11-29 20:15:32,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:32,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:15:32,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:15:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:32,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:32,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-29 20:15:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251692558] [2020-11-29 20:15:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-29 20:15:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-29 20:15:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 20:15:32,653 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 36 states. [2020-11-29 20:15:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:33,947 INFO L93 Difference]: Finished difference Result 240 states and 555 transitions. [2020-11-29 20:15:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-29 20:15:33,948 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-29 20:15:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:33,950 INFO L225 Difference]: With dead ends: 240 [2020-11-29 20:15:33,950 INFO L226 Difference]: Without dead ends: 234 [2020-11-29 20:15:33,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1437, Invalid=3255, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 20:15:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-29 20:15:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 130. [2020-11-29 20:15:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-29 20:15:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-11-29 20:15:33,953 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-11-29 20:15:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:33,953 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-11-29 20:15:33,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-29 20:15:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-11-29 20:15:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:15:33,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:33,956 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:34,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:34,176 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1894025454, now seen corresponding path program 93 times [2020-11-29 20:15:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:34,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395685826] [2020-11-29 20:15:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395685826] [2020-11-29 20:15:34,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734835296] [2020-11-29 20:15:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:34,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 20:15:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 20:15:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:34,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:34,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-29 20:15:34,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021065000] [2020-11-29 20:15:34,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 20:15:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 20:15:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:15:34,979 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 37 states. [2020-11-29 20:15:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:37,593 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-11-29 20:15:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-29 20:15:37,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-29 20:15:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:37,595 INFO L225 Difference]: With dead ends: 208 [2020-11-29 20:15:37,595 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 20:15:37,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2702, Invalid=7198, Unknown=0, NotChecked=0, Total=9900 [2020-11-29 20:15:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 20:15:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 99. [2020-11-29 20:15:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 20:15:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-11-29 20:15:37,598 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 40 [2020-11-29 20:15:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:37,599 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-11-29 20:15:37,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 20:15:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-11-29 20:15:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:15:37,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:37,599 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:37,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:37,812 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1035415612, now seen corresponding path program 94 times [2020-11-29 20:15:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:37,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294662812] [2020-11-29 20:15:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:38,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294662812] [2020-11-29 20:15:38,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22467715] [2020-11-29 20:15:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:38,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:15:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:15:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:38,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:38,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:38,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-29 20:15:38,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979481477] [2020-11-29 20:15:38,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 20:15:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 20:15:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:15:38,647 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 37 states. [2020-11-29 20:15:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:41,612 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-29 20:15:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-29 20:15:41,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-29 20:15:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:41,614 INFO L225 Difference]: With dead ends: 203 [2020-11-29 20:15:41,614 INFO L226 Difference]: Without dead ends: 198 [2020-11-29 20:15:41,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3274, Invalid=7028, Unknown=0, NotChecked=0, Total=10302 [2020-11-29 20:15:41,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-29 20:15:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 131. [2020-11-29 20:15:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-29 20:15:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 339 transitions. [2020-11-29 20:15:41,618 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 339 transitions. Word has length 40 [2020-11-29 20:15:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:41,618 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 339 transitions. [2020-11-29 20:15:41,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 20:15:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 339 transitions. [2020-11-29 20:15:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 20:15:41,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:41,618 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:41,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:41,819 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1414778559, now seen corresponding path program 95 times [2020-11-29 20:15:41,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:41,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199722766] [2020-11-29 20:15:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:42,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199722766] [2020-11-29 20:15:42,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57983391] [2020-11-29 20:15:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:42,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-29 20:15:42,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 20:15:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:42,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:42,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:42,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-29 20:15:42,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568132020] [2020-11-29 20:15:42,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 20:15:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 20:15:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:15:42,650 INFO L87 Difference]: Start difference. First operand 131 states and 339 transitions. Second operand 38 states. [2020-11-29 20:15:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:45,644 INFO L93 Difference]: Finished difference Result 175 states and 431 transitions. [2020-11-29 20:15:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-29 20:15:45,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-29 20:15:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:45,647 INFO L225 Difference]: With dead ends: 175 [2020-11-29 20:15:45,647 INFO L226 Difference]: Without dead ends: 170 [2020-11-29 20:15:45,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3299, Invalid=7207, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 20:15:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-29 20:15:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2020-11-29 20:15:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 20:15:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-11-29 20:15:45,651 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 41 [2020-11-29 20:15:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:45,651 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-11-29 20:15:45,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 20:15:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-11-29 20:15:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 20:15:45,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:45,652 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:45,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-29 20:15:45,868 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:45,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2033090294, now seen corresponding path program 96 times [2020-11-29 20:15:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:45,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388844164] [2020-11-29 20:15:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388844164] [2020-11-29 20:15:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561906922] [2020-11-29 20:15:46,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:46,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-29 20:15:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:15:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:46,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:46,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-29 20:15:46,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117601362] [2020-11-29 20:15:46,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 20:15:46,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 20:15:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:15:46,832 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 38 states. [2020-11-29 20:15:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:49,750 INFO L93 Difference]: Finished difference Result 213 states and 509 transitions. [2020-11-29 20:15:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-29 20:15:49,751 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-29 20:15:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:49,753 INFO L225 Difference]: With dead ends: 213 [2020-11-29 20:15:49,753 INFO L226 Difference]: Without dead ends: 204 [2020-11-29 20:15:49,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3010, Invalid=7910, Unknown=0, NotChecked=0, Total=10920 [2020-11-29 20:15:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-11-29 20:15:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2020-11-29 20:15:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-29 20:15:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-29 20:15:49,756 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-29 20:15:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:49,756 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-29 20:15:49,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 20:15:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-29 20:15:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 20:15:49,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:49,757 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:49,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:49,958 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:49,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:49,958 INFO L82 PathProgramCache]: Analyzing trace with hash 133498903, now seen corresponding path program 97 times [2020-11-29 20:15:49,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:49,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992811210] [2020-11-29 20:15:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992811210] [2020-11-29 20:15:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669681872] [2020-11-29 20:15:50,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 20:15:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:50,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:15:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:50,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:50,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-29 20:15:50,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773824443] [2020-11-29 20:15:50,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 20:15:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 20:15:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:15:50,968 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 38 states. [2020-11-29 20:15:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:52,423 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-29 20:15:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 20:15:52,424 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-29 20:15:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:52,425 INFO L225 Difference]: With dead ends: 176 [2020-11-29 20:15:52,425 INFO L226 Difference]: Without dead ends: 170 [2020-11-29 20:15:52,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1692, Invalid=3564, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 20:15:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-29 20:15:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-11-29 20:15:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 20:15:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 351 transitions. [2020-11-29 20:15:52,428 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 351 transitions. Word has length 42 [2020-11-29 20:15:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:52,428 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 351 transitions. [2020-11-29 20:15:52,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 20:15:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 351 transitions. [2020-11-29 20:15:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 20:15:52,429 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:52,429 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:52,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-11-29 20:15:52,629 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1057112057, now seen corresponding path program 98 times [2020-11-29 20:15:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:52,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653347993] [2020-11-29 20:15:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653347993] [2020-11-29 20:15:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706333530] [2020-11-29 20:15:53,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:53,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:15:53,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:15:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:53,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:53,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-29 20:15:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029701243] [2020-11-29 20:15:53,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 20:15:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 20:15:53,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:15:53,575 INFO L87 Difference]: Start difference. First operand 136 states and 351 transitions. Second operand 38 states. [2020-11-29 20:15:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:55,185 INFO L93 Difference]: Finished difference Result 252 states and 583 transitions. [2020-11-29 20:15:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 20:15:55,186 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-29 20:15:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:55,187 INFO L225 Difference]: With dead ends: 252 [2020-11-29 20:15:55,187 INFO L226 Difference]: Without dead ends: 246 [2020-11-29 20:15:55,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1611, Invalid=3645, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 20:15:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-11-29 20:15:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 136. [2020-11-29 20:15:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 20:15:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 351 transitions. [2020-11-29 20:15:55,191 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 351 transitions. Word has length 42 [2020-11-29 20:15:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:55,192 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 351 transitions. [2020-11-29 20:15:55,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 20:15:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 351 transitions. [2020-11-29 20:15:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 20:15:55,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:55,195 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:15:55,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:55,396 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:15:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:15:55,396 INFO L82 PathProgramCache]: Analyzing trace with hash 908484975, now seen corresponding path program 99 times [2020-11-29 20:15:55,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:15:55,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087561884] [2020-11-29 20:15:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:15:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:15:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:56,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087561884] [2020-11-29 20:15:56,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350573794] [2020-11-29 20:15:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:15:56,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-29 20:15:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:15:56,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:15:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:15:56,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:15:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:15:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:15:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-29 20:15:56,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330581266] [2020-11-29 20:15:56,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-29 20:15:56,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:15:56,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-29 20:15:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 20:15:56,354 INFO L87 Difference]: Start difference. First operand 136 states and 351 transitions. Second operand 39 states. [2020-11-29 20:15:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:15:59,871 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-11-29 20:15:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-29 20:15:59,872 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-29 20:15:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:15:59,874 INFO L225 Difference]: With dead ends: 218 [2020-11-29 20:15:59,874 INFO L226 Difference]: Without dead ends: 209 [2020-11-29 20:15:59,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3570, Invalid=7986, Unknown=0, NotChecked=0, Total=11556 [2020-11-29 20:15:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-29 20:15:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 103. [2020-11-29 20:15:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 20:15:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 253 transitions. [2020-11-29 20:15:59,878 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 253 transitions. Word has length 42 [2020-11-29 20:15:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:15:59,878 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 253 transitions. [2020-11-29 20:15:59,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-29 20:15:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 253 transitions. [2020-11-29 20:15:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 20:15:59,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:15:59,879 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:00,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-29 20:16:00,084 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1398735815, now seen corresponding path program 100 times [2020-11-29 20:16:00,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:00,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573833893] [2020-11-29 20:16:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573833893] [2020-11-29 20:16:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873247784] [2020-11-29 20:16:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:01,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:16:01,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:01,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:16:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:01,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:01,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:01,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-29 20:16:01,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254469467] [2020-11-29 20:16:01,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-29 20:16:01,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:01,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-29 20:16:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 20:16:01,099 INFO L87 Difference]: Start difference. First operand 103 states and 253 transitions. Second operand 39 states. [2020-11-29 20:16:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:04,440 INFO L93 Difference]: Finished difference Result 213 states and 509 transitions. [2020-11-29 20:16:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-29 20:16:04,441 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-29 20:16:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:04,441 INFO L225 Difference]: With dead ends: 213 [2020-11-29 20:16:04,441 INFO L226 Difference]: Without dead ends: 208 [2020-11-29 20:16:04,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3665, Invalid=7891, Unknown=0, NotChecked=0, Total=11556 [2020-11-29 20:16:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-29 20:16:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2020-11-29 20:16:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-29 20:16:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-11-29 20:16:04,444 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 42 [2020-11-29 20:16:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:04,444 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-11-29 20:16:04,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-29 20:16:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-11-29 20:16:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 20:16:04,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:04,445 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:04,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-29 20:16:04,652 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1901711358, now seen corresponding path program 101 times [2020-11-29 20:16:04,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:04,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707936049] [2020-11-29 20:16:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:05,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707936049] [2020-11-29 20:16:05,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355401031] [2020-11-29 20:16:05,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:05,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 20:16:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 20:16:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:05,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:05,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-29 20:16:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199501667] [2020-11-29 20:16:05,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 20:16:05,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 20:16:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 20:16:05,681 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 40 states. [2020-11-29 20:16:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:09,177 INFO L93 Difference]: Finished difference Result 183 states and 451 transitions. [2020-11-29 20:16:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-29 20:16:09,178 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-29 20:16:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:09,179 INFO L225 Difference]: With dead ends: 183 [2020-11-29 20:16:09,179 INFO L226 Difference]: Without dead ends: 178 [2020-11-29 20:16:09,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3691, Invalid=8081, Unknown=0, NotChecked=0, Total=11772 [2020-11-29 20:16:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-29 20:16:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2020-11-29 20:16:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 20:16:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 257 transitions. [2020-11-29 20:16:09,182 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 257 transitions. Word has length 43 [2020-11-29 20:16:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:09,182 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 257 transitions. [2020-11-29 20:16:09,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 20:16:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 257 transitions. [2020-11-29 20:16:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 20:16:09,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:09,183 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:09,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-29 20:16:09,392 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash 411159911, now seen corresponding path program 102 times [2020-11-29 20:16:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:09,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981599725] [2020-11-29 20:16:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981599725] [2020-11-29 20:16:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187937109] [2020-11-29 20:16:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:10,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-29 20:16:10,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:10,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 20:16:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:10,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:16:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:10,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:10,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-29 20:16:10,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918961236] [2020-11-29 20:16:10,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 20:16:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:10,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 20:16:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 20:16:10,594 INFO L87 Difference]: Start difference. First operand 104 states and 257 transitions. Second operand 40 states. [2020-11-29 20:16:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:14,131 INFO L93 Difference]: Finished difference Result 223 states and 533 transitions. [2020-11-29 20:16:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-29 20:16:14,132 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-29 20:16:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:14,132 INFO L225 Difference]: With dead ends: 223 [2020-11-29 20:16:14,132 INFO L226 Difference]: Without dead ends: 214 [2020-11-29 20:16:14,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3769, Invalid=8441, Unknown=0, NotChecked=0, Total=12210 [2020-11-29 20:16:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-29 20:16:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 139. [2020-11-29 20:16:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-29 20:16:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-29 20:16:14,136 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-29 20:16:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:14,136 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-29 20:16:14,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 20:16:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-29 20:16:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 20:16:14,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:14,137 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:14,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:14,337 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash -556561062, now seen corresponding path program 103 times [2020-11-29 20:16:14,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:14,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619893334] [2020-11-29 20:16:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619893334] [2020-11-29 20:16:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147907596] [2020-11-29 20:16:15,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 20:16:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:15,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:15,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:15,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-29 20:16:15,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425494888] [2020-11-29 20:16:15,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 20:16:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 20:16:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 20:16:15,470 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 40 states. [2020-11-29 20:16:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:17,092 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-29 20:16:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 20:16:17,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-29 20:16:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:17,094 INFO L225 Difference]: With dead ends: 184 [2020-11-29 20:16:17,094 INFO L226 Difference]: Without dead ends: 178 [2020-11-29 20:16:17,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1881, Invalid=3971, Unknown=0, NotChecked=0, Total=5852 [2020-11-29 20:16:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-29 20:16:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2020-11-29 20:16:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-11-29 20:16:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 367 transitions. [2020-11-29 20:16:17,098 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 367 transitions. Word has length 44 [2020-11-29 20:16:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:17,098 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 367 transitions. [2020-11-29 20:16:17,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 20:16:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 367 transitions. [2020-11-29 20:16:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 20:16:17,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:17,099 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:17,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2020-11-29 20:16:17,299 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2022574410, now seen corresponding path program 104 times [2020-11-29 20:16:17,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:17,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620599451] [2020-11-29 20:16:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620599451] [2020-11-29 20:16:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668543137] [2020-11-29 20:16:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:18,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:16:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 20:16:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:18,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:18,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-29 20:16:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083117360] [2020-11-29 20:16:18,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 20:16:18,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 20:16:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 20:16:18,477 INFO L87 Difference]: Start difference. First operand 142 states and 367 transitions. Second operand 40 states. [2020-11-29 20:16:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:20,088 INFO L93 Difference]: Finished difference Result 264 states and 611 transitions. [2020-11-29 20:16:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 20:16:20,089 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-29 20:16:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:20,090 INFO L225 Difference]: With dead ends: 264 [2020-11-29 20:16:20,090 INFO L226 Difference]: Without dead ends: 258 [2020-11-29 20:16:20,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1795, Invalid=4057, Unknown=0, NotChecked=0, Total=5852 [2020-11-29 20:16:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-11-29 20:16:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 142. [2020-11-29 20:16:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-11-29 20:16:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 367 transitions. [2020-11-29 20:16:20,093 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 367 transitions. Word has length 44 [2020-11-29 20:16:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:20,093 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 367 transitions. [2020-11-29 20:16:20,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 20:16:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 367 transitions. [2020-11-29 20:16:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 20:16:20,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:20,094 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:20,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:20,294 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1176512652, now seen corresponding path program 105 times [2020-11-29 20:16:20,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825483199] [2020-11-29 20:16:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825483199] [2020-11-29 20:16:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951152668] [2020-11-29 20:16:21,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:21,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-29 20:16:21,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:21,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 20:16:21,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:21,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:16:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:21,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:21,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-29 20:16:21,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536460263] [2020-11-29 20:16:21,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-29 20:16:21,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-29 20:16:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 20:16:21,371 INFO L87 Difference]: Start difference. First operand 142 states and 367 transitions. Second operand 41 states. [2020-11-29 20:16:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:25,287 INFO L93 Difference]: Finished difference Result 228 states and 543 transitions. [2020-11-29 20:16:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-11-29 20:16:25,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-29 20:16:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:25,289 INFO L225 Difference]: With dead ends: 228 [2020-11-29 20:16:25,289 INFO L226 Difference]: Without dead ends: 219 [2020-11-29 20:16:25,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3977, Invalid=8905, Unknown=0, NotChecked=0, Total=12882 [2020-11-29 20:16:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-29 20:16:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 107. [2020-11-29 20:16:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 20:16:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 263 transitions. [2020-11-29 20:16:25,291 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 263 transitions. Word has length 44 [2020-11-29 20:16:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:25,292 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 263 transitions. [2020-11-29 20:16:25,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-29 20:16:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 263 transitions. [2020-11-29 20:16:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 20:16:25,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:25,292 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:25,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-11-29 20:16:25,493 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash -138919158, now seen corresponding path program 106 times [2020-11-29 20:16:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:25,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990596522] [2020-11-29 20:16:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990596522] [2020-11-29 20:16:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032229895] [2020-11-29 20:16:26,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:26,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:16:26,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:26,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 20:16:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:26,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:26,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:26,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-29 20:16:26,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562909452] [2020-11-29 20:16:26,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-29 20:16:26,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-29 20:16:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 20:16:26,517 INFO L87 Difference]: Start difference. First operand 107 states and 263 transitions. Second operand 41 states. [2020-11-29 20:16:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:30,212 INFO L93 Difference]: Finished difference Result 223 states and 533 transitions. [2020-11-29 20:16:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-29 20:16:30,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-29 20:16:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:30,213 INFO L225 Difference]: With dead ends: 223 [2020-11-29 20:16:30,213 INFO L226 Difference]: Without dead ends: 218 [2020-11-29 20:16:30,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4078, Invalid=8804, Unknown=0, NotChecked=0, Total=12882 [2020-11-29 20:16:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-29 20:16:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 143. [2020-11-29 20:16:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-29 20:16:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 371 transitions. [2020-11-29 20:16:30,216 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 371 transitions. Word has length 44 [2020-11-29 20:16:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:30,216 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 371 transitions. [2020-11-29 20:16:30,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-29 20:16:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 371 transitions. [2020-11-29 20:16:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 20:16:30,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:30,216 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:30,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:30,417 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2112179333, now seen corresponding path program 107 times [2020-11-29 20:16:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:30,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936304263] [2020-11-29 20:16:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:31,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936304263] [2020-11-29 20:16:31,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139650393] [2020-11-29 20:16:31,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:31,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-29 20:16:31,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 20:16:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:31,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:31,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:31,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-29 20:16:31,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674319519] [2020-11-29 20:16:31,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 20:16:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 20:16:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:16:31,590 INFO L87 Difference]: Start difference. First operand 143 states and 371 transitions. Second operand 42 states. [2020-11-29 20:16:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:35,554 INFO L93 Difference]: Finished difference Result 191 states and 471 transitions. [2020-11-29 20:16:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-29 20:16:35,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-29 20:16:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:35,555 INFO L225 Difference]: With dead ends: 191 [2020-11-29 20:16:35,555 INFO L226 Difference]: Without dead ends: 186 [2020-11-29 20:16:35,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4105, Invalid=9005, Unknown=0, NotChecked=0, Total=13110 [2020-11-29 20:16:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-29 20:16:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 108. [2020-11-29 20:16:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-29 20:16:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 267 transitions. [2020-11-29 20:16:35,559 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 267 transitions. Word has length 45 [2020-11-29 20:16:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:35,559 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 267 transitions. [2020-11-29 20:16:35,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 20:16:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 267 transitions. [2020-11-29 20:16:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 20:16:35,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:35,560 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:35,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:35,768 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash -11503996, now seen corresponding path program 108 times [2020-11-29 20:16:35,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:35,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782746432] [2020-11-29 20:16:35,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:36,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782746432] [2020-11-29 20:16:36,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641983952] [2020-11-29 20:16:36,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:36,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 20:16:36,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 20:16:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:36,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:16:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:36,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:36,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-29 20:16:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733721923] [2020-11-29 20:16:36,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 20:16:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 20:16:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:16:36,840 INFO L87 Difference]: Start difference. First operand 108 states and 267 transitions. Second operand 42 states. [2020-11-29 20:16:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:40,505 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2020-11-29 20:16:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-29 20:16:40,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-29 20:16:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:40,506 INFO L225 Difference]: With dead ends: 233 [2020-11-29 20:16:40,507 INFO L226 Difference]: Without dead ends: 224 [2020-11-29 20:16:40,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4187, Invalid=9385, Unknown=0, NotChecked=0, Total=13572 [2020-11-29 20:16:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-11-29 20:16:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 145. [2020-11-29 20:16:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-29 20:16:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-29 20:16:40,510 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-29 20:16:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:40,510 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-29 20:16:40,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 20:16:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-29 20:16:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:16:40,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:40,511 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:40,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2020-11-29 20:16:40,711 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2015743453, now seen corresponding path program 109 times [2020-11-29 20:16:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:40,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555014690] [2020-11-29 20:16:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:41,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555014690] [2020-11-29 20:16:41,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602082223] [2020-11-29 20:16:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 20:16:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:41,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:41,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:41,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-29 20:16:41,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614039123] [2020-11-29 20:16:41,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 20:16:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 20:16:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:16:41,949 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 42 states. [2020-11-29 20:16:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:43,677 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-29 20:16:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 20:16:43,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-29 20:16:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:43,679 INFO L225 Difference]: With dead ends: 192 [2020-11-29 20:16:43,679 INFO L226 Difference]: Without dead ends: 186 [2020-11-29 20:16:43,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2080, Invalid=4400, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 20:16:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-29 20:16:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2020-11-29 20:16:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 20:16:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2020-11-29 20:16:43,681 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 46 [2020-11-29 20:16:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:43,681 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2020-11-29 20:16:43,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 20:16:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2020-11-29 20:16:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:16:43,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:43,682 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:43,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:43,883 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1926165043, now seen corresponding path program 110 times [2020-11-29 20:16:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:43,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622477223] [2020-11-29 20:16:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:44,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622477223] [2020-11-29 20:16:44,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896439454] [2020-11-29 20:16:44,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:45,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:16:45,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 20:16:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:45,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:45,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-29 20:16:45,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390777967] [2020-11-29 20:16:45,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-29 20:16:45,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:45,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-29 20:16:45,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1298, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 20:16:45,103 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand 42 states. [2020-11-29 20:16:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:46,929 INFO L93 Difference]: Finished difference Result 276 states and 639 transitions. [2020-11-29 20:16:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 20:16:46,930 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-29 20:16:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:46,931 INFO L225 Difference]: With dead ends: 276 [2020-11-29 20:16:46,931 INFO L226 Difference]: Without dead ends: 270 [2020-11-29 20:16:46,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1989, Invalid=4491, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 20:16:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-11-29 20:16:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 148. [2020-11-29 20:16:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-29 20:16:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2020-11-29 20:16:46,934 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 46 [2020-11-29 20:16:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:46,934 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2020-11-29 20:16:46,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-29 20:16:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2020-11-29 20:16:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:16:46,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:46,934 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:47,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:47,135 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1053072489, now seen corresponding path program 111 times [2020-11-29 20:16:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:47,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323030258] [2020-11-29 20:16:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:48,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323030258] [2020-11-29 20:16:48,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303816660] [2020-11-29 20:16:48,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:48,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-11-29 20:16:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 20:16:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:48,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:16:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:48,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-29 20:16:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001104283] [2020-11-29 20:16:48,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-29 20:16:48,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-29 20:16:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 20:16:48,232 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand 43 states. [2020-11-29 20:16:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:52,333 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-11-29 20:16:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-29 20:16:52,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-29 20:16:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:52,335 INFO L225 Difference]: With dead ends: 238 [2020-11-29 20:16:52,335 INFO L226 Difference]: Without dead ends: 229 [2020-11-29 20:16:52,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4406, Invalid=9874, Unknown=0, NotChecked=0, Total=14280 [2020-11-29 20:16:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-29 20:16:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2020-11-29 20:16:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-29 20:16:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 273 transitions. [2020-11-29 20:16:52,339 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 273 transitions. Word has length 46 [2020-11-29 20:16:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:52,339 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 273 transitions. [2020-11-29 20:16:52,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-29 20:16:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 273 transitions. [2020-11-29 20:16:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:16:52,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:52,340 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:52,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-11-29 20:16:52,552 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash -356598387, now seen corresponding path program 112 times [2020-11-29 20:16:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:52,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292283291] [2020-11-29 20:16:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:53,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292283291] [2020-11-29 20:16:53,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742470280] [2020-11-29 20:16:53,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:53,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:16:53,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 20:16:53,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:53,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:53,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:53,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-29 20:16:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820479967] [2020-11-29 20:16:53,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-29 20:16:53,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-29 20:16:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 20:16:53,836 INFO L87 Difference]: Start difference. First operand 111 states and 273 transitions. Second operand 43 states. [2020-11-29 20:16:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:16:57,774 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2020-11-29 20:16:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-29 20:16:57,775 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-29 20:16:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:16:57,776 INFO L225 Difference]: With dead ends: 233 [2020-11-29 20:16:57,776 INFO L226 Difference]: Without dead ends: 228 [2020-11-29 20:16:57,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4513, Invalid=9767, Unknown=0, NotChecked=0, Total=14280 [2020-11-29 20:16:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-29 20:16:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 149. [2020-11-29 20:16:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-29 20:16:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 387 transitions. [2020-11-29 20:16:57,779 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 387 transitions. Word has length 46 [2020-11-29 20:16:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:16:57,779 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 387 transitions. [2020-11-29 20:16:57,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-29 20:16:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 387 transitions. [2020-11-29 20:16:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 20:16:57,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:16:57,780 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:16:57,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-29 20:16:57,980 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:16:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:16:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1714465720, now seen corresponding path program 113 times [2020-11-29 20:16:57,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:16:57,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977526490] [2020-11-29 20:16:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:16:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:16:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977526490] [2020-11-29 20:16:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671932437] [2020-11-29 20:16:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:16:59,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-29 20:16:59,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:16:59,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 20:16:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:16:59,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:16:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:16:59,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:16:59,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-29 20:16:59,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348154143] [2020-11-29 20:16:59,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 20:16:59,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:16:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 20:16:59,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:16:59,178 INFO L87 Difference]: Start difference. First operand 149 states and 387 transitions. Second operand 44 states. [2020-11-29 20:17:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:03,564 INFO L93 Difference]: Finished difference Result 199 states and 491 transitions. [2020-11-29 20:17:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-29 20:17:03,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-29 20:17:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:03,566 INFO L225 Difference]: With dead ends: 199 [2020-11-29 20:17:03,566 INFO L226 Difference]: Without dead ends: 194 [2020-11-29 20:17:03,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4541, Invalid=9979, Unknown=0, NotChecked=0, Total=14520 [2020-11-29 20:17:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-29 20:17:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 112. [2020-11-29 20:17:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 20:17:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-11-29 20:17:03,568 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 47 [2020-11-29 20:17:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:03,569 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-11-29 20:17:03,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 20:17:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-11-29 20:17:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 20:17:03,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:03,569 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:03,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-29 20:17:03,770 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1830374497, now seen corresponding path program 114 times [2020-11-29 20:17:03,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:03,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784153005] [2020-11-29 20:17:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784153005] [2020-11-29 20:17:04,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147165708] [2020-11-29 20:17:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:04,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-11-29 20:17:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:17:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:04,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:17:04,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-29 20:17:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795947504] [2020-11-29 20:17:04,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 20:17:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 20:17:04,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:17:04,973 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 44 states. [2020-11-29 20:17:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:09,070 INFO L93 Difference]: Finished difference Result 243 states and 581 transitions. [2020-11-29 20:17:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-29 20:17:09,071 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-29 20:17:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:09,072 INFO L225 Difference]: With dead ends: 243 [2020-11-29 20:17:09,072 INFO L226 Difference]: Without dead ends: 234 [2020-11-29 20:17:09,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4111, Invalid=10895, Unknown=0, NotChecked=0, Total=15006 [2020-11-29 20:17:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-29 20:17:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2020-11-29 20:17:09,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-29 20:17:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-11-29 20:17:09,075 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-11-29 20:17:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:09,075 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-11-29 20:17:09,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 20:17:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-11-29 20:17:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 20:17:09,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:09,076 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:09,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:09,276 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash 99219872, now seen corresponding path program 115 times [2020-11-29 20:17:09,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:09,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004481076] [2020-11-29 20:17:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:10,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004481076] [2020-11-29 20:17:10,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889714548] [2020-11-29 20:17:10,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 20:17:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:10,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:17:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:10,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:17:10,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-11-29 20:17:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316133651] [2020-11-29 20:17:10,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 20:17:10,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 20:17:10,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:17:10,666 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 44 states. [2020-11-29 20:17:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:12,657 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-11-29 20:17:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-29 20:17:12,658 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-11-29 20:17:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:12,659 INFO L225 Difference]: With dead ends: 200 [2020-11-29 20:17:12,659 INFO L226 Difference]: Without dead ends: 194 [2020-11-29 20:17:12,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2289, Invalid=4851, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 20:17:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-29 20:17:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-11-29 20:17:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-29 20:17:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 399 transitions. [2020-11-29 20:17:12,661 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 399 transitions. Word has length 48 [2020-11-29 20:17:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:12,661 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 399 transitions. [2020-11-29 20:17:12,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 20:17:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 399 transitions. [2020-11-29 20:17:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 20:17:12,661 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:12,662 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:12,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-11-29 20:17:12,862 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 86310288, now seen corresponding path program 116 times [2020-11-29 20:17:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619318626] [2020-11-29 20:17:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:14,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619318626] [2020-11-29 20:17:14,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618106915] [2020-11-29 20:17:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:14,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:17:14,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:17:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:14,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:17:14,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-11-29 20:17:14,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849785659] [2020-11-29 20:17:14,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 20:17:14,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 20:17:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:17:14,306 INFO L87 Difference]: Start difference. First operand 154 states and 399 transitions. Second operand 44 states. [2020-11-29 20:17:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:16,309 INFO L93 Difference]: Finished difference Result 288 states and 667 transitions. [2020-11-29 20:17:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 20:17:16,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-11-29 20:17:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:16,311 INFO L225 Difference]: With dead ends: 288 [2020-11-29 20:17:16,311 INFO L226 Difference]: Without dead ends: 282 [2020-11-29 20:17:16,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2193, Invalid=4947, Unknown=0, NotChecked=0, Total=7140 [2020-11-29 20:17:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-29 20:17:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 154. [2020-11-29 20:17:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-29 20:17:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 399 transitions. [2020-11-29 20:17:16,314 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 399 transitions. Word has length 48 [2020-11-29 20:17:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:16,314 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 399 transitions. [2020-11-29 20:17:16,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 20:17:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 399 transitions. [2020-11-29 20:17:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 20:17:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:16,314 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:16,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-29 20:17:16,515 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1608807162, now seen corresponding path program 117 times [2020-11-29 20:17:16,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:16,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262430630] [2020-11-29 20:17:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:17,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262430630] [2020-11-29 20:17:17,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497837128] [2020-11-29 20:17:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:17,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-29 20:17:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 20:17:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:17,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:17:17,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-29 20:17:17,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986601298] [2020-11-29 20:17:17,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-29 20:17:17,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-29 20:17:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:17:17,868 INFO L87 Difference]: Start difference. First operand 154 states and 399 transitions. Second operand 45 states. [2020-11-29 20:17:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:22,305 INFO L93 Difference]: Finished difference Result 248 states and 591 transitions. [2020-11-29 20:17:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-29 20:17:22,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-11-29 20:17:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:22,307 INFO L225 Difference]: With dead ends: 248 [2020-11-29 20:17:22,307 INFO L226 Difference]: Without dead ends: 239 [2020-11-29 20:17:22,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4136, Invalid=11116, Unknown=0, NotChecked=0, Total=15252 [2020-11-29 20:17:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-29 20:17:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 115. [2020-11-29 20:17:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-29 20:17:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 283 transitions. [2020-11-29 20:17:22,310 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 283 transitions. Word has length 48 [2020-11-29 20:17:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:22,310 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 283 transitions. [2020-11-29 20:17:22,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-29 20:17:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 283 transitions. [2020-11-29 20:17:22,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-29 20:17:22,311 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:22,311 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:22,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-29 20:17:22,511 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash 907060048, now seen corresponding path program 118 times [2020-11-29 20:17:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:22,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285055359] [2020-11-29 20:17:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:23,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285055359] [2020-11-29 20:17:23,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694906712] [2020-11-29 20:17:23,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:23,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:17:23,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:17:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:23,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:17:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:23,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:17:23,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-29 20:17:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863372563] [2020-11-29 20:17:23,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-29 20:17:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-29 20:17:23,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:17:23,751 INFO L87 Difference]: Start difference. First operand 115 states and 283 transitions. Second operand 45 states. [2020-11-29 20:17:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:28,571 INFO L93 Difference]: Finished difference Result 243 states and 581 transitions. [2020-11-29 20:17:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-29 20:17:28,573 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-11-29 20:17:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:28,573 INFO L225 Difference]: With dead ends: 243 [2020-11-29 20:17:28,574 INFO L226 Difference]: Without dead ends: 238 [2020-11-29 20:17:28,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4970, Invalid=10780, Unknown=0, NotChecked=0, Total=15750 [2020-11-29 20:17:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-29 20:17:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2020-11-29 20:17:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-29 20:17:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 403 transitions. [2020-11-29 20:17:28,577 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 403 transitions. Word has length 48 [2020-11-29 20:17:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:28,577 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 403 transitions. [2020-11-29 20:17:28,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-29 20:17:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 403 transitions. [2020-11-29 20:17:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 20:17:28,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:28,577 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:28,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:28,778 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1666611019, now seen corresponding path program 119 times [2020-11-29 20:17:28,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:28,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695979137] [2020-11-29 20:17:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 342 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695979137] [2020-11-29 20:17:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156837582] [2020-11-29 20:17:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:29,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-11-29 20:17:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:17:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:17:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-11-29 20:17:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845693825] [2020-11-29 20:17:29,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:17:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:17:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=340, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:17:29,515 INFO L87 Difference]: Start difference. First operand 155 states and 403 transitions. Second operand 23 states. [2020-11-29 20:17:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:29,625 INFO L93 Difference]: Finished difference Result 1409 states and 3559 transitions. [2020-11-29 20:17:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:17:29,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-11-29 20:17:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:29,627 INFO L225 Difference]: With dead ends: 1409 [2020-11-29 20:17:29,628 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 20:17:29,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=340, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:17:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 20:17:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-11-29 20:17:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 20:17:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 204 transitions. [2020-11-29 20:17:29,630 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 204 transitions. Word has length 49 [2020-11-29 20:17:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:29,632 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 204 transitions. [2020-11-29 20:17:29,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:17:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 204 transitions. [2020-11-29 20:17:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 20:17:29,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:17:29,632 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:17:29,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:29,848 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:17:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:17:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1945886978, now seen corresponding path program 120 times [2020-11-29 20:17:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:17:29,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808954629] [2020-11-29 20:17:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:17:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:17:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808954629] [2020-11-29 20:17:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427326692] [2020-11-29 20:17:30,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:30,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-29 20:17:30,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:17:30,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:17:30,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:17:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:17:30,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:17:30,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2020-11-29 20:17:30,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63009316] [2020-11-29 20:17:30,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:17:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:17:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:17:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:17:30,492 INFO L87 Difference]: Start difference. First operand 104 states and 204 transitions. Second operand 23 states. [2020-11-29 20:17:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:17:30,576 INFO L93 Difference]: Finished difference Result 852 states and 1597 transitions. [2020-11-29 20:17:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 20:17:30,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-11-29 20:17:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:17:30,578 INFO L225 Difference]: With dead ends: 852 [2020-11-29 20:17:30,578 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:17:30,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:17:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:17:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:17:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:17:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:17:30,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-11-29 20:17:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:17:30,579 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:17:30,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:17:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:17:30,579 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:17:30,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:17:30,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:17:30 BasicIcfg [2020-11-29 20:17:30,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:17:30,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:17:30,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:17:30,783 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:17:30,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:17" (3/4) ... [2020-11-29 20:17:30,786 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:17:30,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-11-29 20:17:30,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-11-29 20:17:30,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-29 20:17:30,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 20:17:30,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 20:17:30,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:17:30,855 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2b02aa8a-1a50-4d2d-a538-1f2351d8186a/bin/uautomizer/witness.graphml [2020-11-29 20:17:30,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:17:30,856 INFO L168 Benchmark]: Toolchain (without parser) took 254833.77 ms. Allocated memory was 98.6 MB in the beginning and 234.9 MB in the end (delta: 136.3 MB). Free memory was 65.8 MB in the beginning and 123.4 MB in the end (delta: -57.6 MB). Peak memory consumption was 77.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,856 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 71.3 MB. Free memory is still 31.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:17:30,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 593.26 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 56.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.38 ms. Allocated memory is still 98.6 MB. Free memory was 56.8 MB in the beginning and 54.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,858 INFO L168 Benchmark]: Boogie Preprocessor took 54.34 ms. Allocated memory is still 98.6 MB. Free memory was 54.7 MB in the beginning and 53.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:17:30,858 INFO L168 Benchmark]: RCFGBuilder took 621.58 ms. Allocated memory is still 98.6 MB. Free memory was 53.5 MB in the beginning and 73.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,858 INFO L168 Benchmark]: TraceAbstraction took 253399.19 ms. Allocated memory was 98.6 MB in the beginning and 234.9 MB in the end (delta: 136.3 MB). Free memory was 73.0 MB in the beginning and 125.5 MB in the end (delta: -52.5 MB). Peak memory consumption was 84.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,859 INFO L168 Benchmark]: Witness Printer took 72.46 ms. Allocated memory is still 234.9 MB. Free memory was 125.5 MB in the beginning and 123.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:17:30,860 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 71.3 MB. Free memory is still 31.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 593.26 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 56.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.38 ms. Allocated memory is still 98.6 MB. Free memory was 56.8 MB in the beginning and 54.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.34 ms. Allocated memory is still 98.6 MB. Free memory was 54.7 MB in the beginning and 53.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 621.58 ms. Allocated memory is still 98.6 MB. Free memory was 53.5 MB in the beginning and 73.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 253399.19 ms. Allocated memory was 98.6 MB in the beginning and 234.9 MB in the end (delta: 136.3 MB). Free memory was 73.0 MB in the beginning and 125.5 MB in the end (delta: -52.5 MB). Peak memory consumption was 84.6 MB. Max. memory is 16.1 GB. * Witness Printer took 72.46 ms. Allocated memory is still 234.9 MB. Free memory was 125.5 MB in the beginning and 123.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.3s, 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: 253.2s, OverallIterations: 122, TraceHistogramMax: 21, AutomataDifference: 157.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 1985 SDtfs, 10822 SDslu, 14397 SDs, 0 SdLazy, 17126 SolverSat, 11943 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10311 GetRequests, 3194 SyntacticMatches, 95 SemanticMatches, 7022 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142096 ImplicationChecksByTransitivity, 182.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 122 MinimizatonAttempts, 5873 StatesRemovedByMinimization, 119 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 58.0s InterpolantComputationTime, 7014 NumberOfCodeBlocks, 7014 NumberOfCodeBlocksAsserted, 886 NumberOfCheckSat, 6776 ConstructedInterpolants, 0 QuantifiedInterpolants, 976090 SizeOfPredicates, 2489 NumberOfNonLiveVariables, 21808 ConjunctsInSsa, 3001 ConjunctsInUnsatCore, 238 InterpolantComputations, 8 PerfectInterpolantSequences, 1522/32760 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...