./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-2.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_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/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 39211c46f4aae13996ba33c19e2c7157964c8aaa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:41,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:41,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:41,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:41,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:41,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:41,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:41,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:41,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:41,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:41,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:41,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:41,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:41,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:41,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:41,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:41,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:41,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:41,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:41,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:41,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:41,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:41,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:41,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:41,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:41,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:41,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:41,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:41,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:41,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:41,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:41,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:41,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:41,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:41,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:41,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:41,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:41,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:41,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:41,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:41,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:41,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:10:41,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:41,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:41,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:41,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:41,316 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:41,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:41,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:41,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:10:41,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:41,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:41,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:41,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:41,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:41,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:41,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:41,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:41,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:41,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:41,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:41,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:41,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:41,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:41,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:41,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:41,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:41,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:10:41,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:10:41,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:41,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:41,323 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_d7cf9347-fe60-485a-9e79-7c774039a27e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39211c46f4aae13996ba33c19e2c7157964c8aaa [2020-11-30 01:10:41,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:41,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:41,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:41,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:41,651 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:41,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-2.i [2020-11-30 01:10:41,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/data/a9814c0ca/382946237efb47e7b1840fb42084b9d7/FLAG47217ecc9 [2020-11-30 01:10:42,295 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:42,295 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/sv-benchmarks/c/pthread/triangular-2.i [2020-11-30 01:10:42,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/data/a9814c0ca/382946237efb47e7b1840fb42084b9d7/FLAG47217ecc9 [2020-11-30 01:10:42,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/data/a9814c0ca/382946237efb47e7b1840fb42084b9d7 [2020-11-30 01:10:42,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:42,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:42,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:42,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:42,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:42,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:42" (1/1) ... [2020-11-30 01:10:42,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250b8392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:42, skipping insertion in model container [2020-11-30 01:10:42,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:42" (1/1) ... [2020-11-30 01:10:42,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:42,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:43,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:43,029 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:43,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:43,181 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:43,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43 WrapperNode [2020-11-30 01:10:43,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:43,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:43,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:43,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:43,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:43,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:43,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:43,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:43,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... [2020-11-30 01:10:43,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:43,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:43,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:43,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:43,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-30 01:10:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-30 01:10:43,387 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-30 01:10:43,387 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-30 01:10:43,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:10:43,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-30 01:10:43,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:43,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:10:43,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:10:43,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-30 01:10:43,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:43,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:43,391 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-30 01:10:43,784 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:43,784 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:10:43,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:43 BoogieIcfgContainer [2020-11-30 01:10:43,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:43,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:43,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:43,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:43,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:42" (1/3) ... [2020-11-30 01:10:43,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12813cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:43, skipping insertion in model container [2020-11-30 01:10:43,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:43" (2/3) ... [2020-11-30 01:10:43,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12813cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:43, skipping insertion in model container [2020-11-30 01:10:43,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:43" (3/3) ... [2020-11-30 01:10:43,799 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-11-30 01:10:43,815 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-30 01:10:43,815 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:43,820 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:10:43,820 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-30 01:10:43,864 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,865 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,865 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,867 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,867 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,868 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,868 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,868 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,869 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,871 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,872 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,872 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,873 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,873 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,873 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,874 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,874 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,878 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,879 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,879 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,880 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,892 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,894 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,894 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,894 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,894 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,895 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 01:10:43,902 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-30 01:10:43,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-30 01:10:43,949 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:43,949 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:43,949 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:43,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:43,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:43,950 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:43,950 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:43,950 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:43,965 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-30 01:10:43,967 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-30 01:10:43,971 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-30 01:10:43,973 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-30 01:10:44,035 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-30 01:10:44,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-30 01:10:44,041 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. [2020-11-30 01:10:44,045 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-30 01:10:45,389 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-30 01:10:45,869 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-30 01:10:46,047 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-30 01:10:46,064 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-30 01:10:46,064 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-30 01:10:46,069 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-30 01:10:46,078 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-30 01:10:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-30 01:10:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:10:46,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:46,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:10:46,085 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-30 01:10:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:46,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634616209] [2020-11-30 01:10:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634616209] [2020-11-30 01:10:46,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:46,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:10:46,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071618994] [2020-11-30 01:10:46,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:10:46,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:10:46,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:10:46,303 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-30 01:10:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:46,378 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-30 01:10:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:10:46,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 01:10:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:46,392 INFO L225 Difference]: With dead ends: 75 [2020-11-30 01:10:46,392 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 01:10:46,394 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 [2020-11-30 01:10:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 01:10:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 01:10:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 01:10:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-30 01:10:46,443 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-30 01:10:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:46,444 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-30 01:10:46,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:10:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-30 01:10:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:10:46,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:46,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:46,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:10:46,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-30 01:10:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:46,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971841864] [2020-11-30 01:10:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:46,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971841864] [2020-11-30 01:10:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:46,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:10:46,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242447371] [2020-11-30 01:10:46,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:10:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:10:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:10:46,554 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-30 01:10:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:46,604 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-30 01:10:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:10:46,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 01:10:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:46,606 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:10:46,606 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:10:46,607 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 [2020-11-30 01:10:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:10:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-30 01:10:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 01:10:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-30 01:10:46,614 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-30 01:10:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-30 01:10:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:10:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-30 01:10:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:10:46,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:46,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:46,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:10:46,616 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-30 01:10:46,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:46,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644748835] [2020-11-30 01:10:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644748835] [2020-11-30 01:10:46,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:10:46,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017710278] [2020-11-30 01:10:46,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:10:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:46,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:10:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:46,760 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-30 01:10:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:46,854 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-30 01:10:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:10:46,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:10:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:46,857 INFO L225 Difference]: With dead ends: 54 [2020-11-30 01:10:46,857 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 01:10:46,857 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 [2020-11-30 01:10:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 01:10:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-30 01:10:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:10:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-30 01:10:46,863 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-30 01:10:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:46,865 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-30 01:10:46,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:10:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-30 01:10:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:10:46,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:46,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:46,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:10:46,868 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-30 01:10:46,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:46,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191758594] [2020-11-30 01:10:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191758594] [2020-11-30 01:10:46,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:46,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:10:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272508239] [2020-11-30 01:10:46,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:10:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:10:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:46,978 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-30 01:10:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:47,062 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-30 01:10:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:10:47,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:10:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:47,066 INFO L225 Difference]: With dead ends: 84 [2020-11-30 01:10:47,066 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 01:10:47,066 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 [2020-11-30 01:10:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 01:10:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-30 01:10:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:10:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-30 01:10:47,075 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-30 01:10:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:47,076 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-30 01:10:47,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:10:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-30 01:10:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:10:47,077 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:47,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:47,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:10:47,078 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:47,078 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-30 01:10:47,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:47,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814949885] [2020-11-30 01:10:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:47,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814949885] [2020-11-30 01:10:47,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:47,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:10:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486880108] [2020-11-30 01:10:47,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:10:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:47,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:10:47,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:47,158 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-30 01:10:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:47,271 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-30 01:10:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:10:47,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:10:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:47,273 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:10:47,273 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:10:47,274 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 [2020-11-30 01:10:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:10:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-30 01:10:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 01:10:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-30 01:10:47,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-30 01:10:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:47,285 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-30 01:10:47,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:10:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-30 01:10:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:10:47,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:47,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:47,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:10:47,286 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-30 01:10:47,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:47,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128625484] [2020-11-30 01:10:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:47,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128625484] [2020-11-30 01:10:47,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:47,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:10:47,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527696791] [2020-11-30 01:10:47,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:10:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:10:47,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:10:47,370 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-30 01:10:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:47,461 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-30 01:10:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:10:47,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:10:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:47,466 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:10:47,466 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:10:47,466 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 [2020-11-30 01:10:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:10:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-30 01:10:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-30 01:10:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-30 01:10:47,472 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-30 01:10:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:47,472 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-30 01:10:47,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:10:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-30 01:10:47,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:10:47,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:47,473 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:47,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 01:10:47,473 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-30 01:10:47,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:47,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106076091] [2020-11-30 01:10:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:47,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106076091] [2020-11-30 01:10:47,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700927789] [2020-11-30 01:10:47,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:47,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:10:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:47,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:47,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:47,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-30 01:10:47,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26366553] [2020-11-30 01:10:47,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:10:47,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:47,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:10:47,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:10:47,839 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-30 01:10:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:48,000 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-11-30 01:10:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:10:48,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 01:10:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:48,002 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:10:48,002 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:10:48,002 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 [2020-11-30 01:10:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:10:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-30 01:10:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 01:10:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-30 01:10:48,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-30 01:10:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:48,016 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-30 01:10:48,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:10:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-30 01:10:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:10:48,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:48,019 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:48,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 01:10:48,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-11-30 01:10:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:48,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481992310] [2020-11-30 01:10:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:48,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481992310] [2020-11-30 01:10:48,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690928691] [2020-11-30 01:10:48,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:48,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-30 01:10:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:10:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:48,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:48,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-30 01:10:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262532118] [2020-11-30 01:10:48,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:10:48,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:10:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:10:48,441 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-11-30 01:10:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:48,648 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-30 01:10:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:10:48,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 01:10:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:48,649 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:10:48,649 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 01:10:48,650 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 [2020-11-30 01:10:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 01:10:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-30 01:10:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:10:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-30 01:10:48,659 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-30 01:10:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:48,660 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-30 01:10:48,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:10:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-30 01:10:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:10:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:48,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:48,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:48,885 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-11-30 01:10:48,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:48,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344342446] [2020-11-30 01:10:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:48,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344342446] [2020-11-30 01:10:48,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707009180] [2020-11-30 01:10:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:10:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:49,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:49,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:49,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-30 01:10:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141588918] [2020-11-30 01:10:49,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:10:49,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:10:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:10:49,100 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-30 01:10:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:49,212 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-30 01:10:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:10:49,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 01:10:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:49,213 INFO L225 Difference]: With dead ends: 56 [2020-11-30 01:10:49,213 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 01:10:49,214 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 [2020-11-30 01:10:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 01:10:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-30 01:10:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-30 01:10:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-30 01:10:49,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-30 01:10:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:49,218 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-30 01:10:49,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:10:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-30 01:10:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:10:49,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:49,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:49,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:49,420 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-11-30 01:10:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:49,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581279883] [2020-11-30 01:10:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581279883] [2020-11-30 01:10:49,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236339017] [2020-11-30 01:10:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:49,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:49,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:10:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:49,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:49,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-30 01:10:49,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544602468] [2020-11-30 01:10:49,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:10:49,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:49,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:10:49,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:10:49,642 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-11-30 01:10:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:49,775 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-11-30 01:10:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:10:49,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 01:10:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:49,776 INFO L225 Difference]: With dead ends: 72 [2020-11-30 01:10:49,776 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 01:10:49,777 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 [2020-11-30 01:10:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 01:10:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-30 01:10:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-30 01:10:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-30 01:10:49,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-30 01:10:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:49,781 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-30 01:10:49,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:10:49,781 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-30 01:10:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:10:49,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:49,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:49,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:49,983 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-11-30 01:10:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:49,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713623998] [2020-11-30 01:10:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713623998] [2020-11-30 01:10:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256236329] [2020-11-30 01:10:50,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:50,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:10:50,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:10:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:50,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:10:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:50,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:50,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-30 01:10:50,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133486619] [2020-11-30 01:10:50,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:10:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:10:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:10:50,203 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-30 01:10:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:50,440 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-11-30 01:10:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:10:50,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-30 01:10:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:50,441 INFO L225 Difference]: With dead ends: 68 [2020-11-30 01:10:50,441 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 01:10:50,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:10:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 01:10:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-11-30 01:10:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 01:10:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-11-30 01:10:50,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-11-30 01:10:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:50,446 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-11-30 01:10:50,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:10:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-11-30 01:10:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:10:50,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:50,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:50,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-30 01:10:50,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-11-30 01:10:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:50,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340028793] [2020-11-30 01:10:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:50,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340028793] [2020-11-30 01:10:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500574588] [2020-11-30 01:10:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:50,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:10:50,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:10:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:50,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:50,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:50,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-30 01:10:50,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657477162] [2020-11-30 01:10:50,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:10:50,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:10:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:10:50,849 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-11-30 01:10:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:51,029 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-30 01:10:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:10:51,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-30 01:10:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:51,031 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:10:51,031 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:10:51,031 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 [2020-11-30 01:10:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:10:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-30 01:10:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:10:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-30 01:10:51,035 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-30 01:10:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:51,035 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-30 01:10:51,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:10:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-30 01:10:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:10:51,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:51,036 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:51,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:51,252 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:51,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-11-30 01:10:51,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:51,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223513694] [2020-11-30 01:10:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223513694] [2020-11-30 01:10:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974123094] [2020-11-30 01:10:51,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:51,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-30 01:10:51,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:51,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:10:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:51,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:51,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:51,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 01:10:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956135892] [2020-11-30 01:10:51,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:51,438 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-30 01:10:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:51,638 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-11-30 01:10:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:10:51,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-30 01:10:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:51,639 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:10:51,639 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:10:51,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:10:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:10:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-11-30 01:10:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 01:10:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-11-30 01:10:51,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-11-30 01:10:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:51,645 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-11-30 01:10:51,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:10:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-11-30 01:10:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:10:51,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:51,646 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:51,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:51,860 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-11-30 01:10:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:51,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551598532] [2020-11-30 01:10:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551598532] [2020-11-30 01:10:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833249916] [2020-11-30 01:10:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:51,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-30 01:10:51,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 01:10:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:52,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:10:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:52,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:52,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-30 01:10:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550006023] [2020-11-30 01:10:52,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:52,047 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-11-30 01:10:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:52,298 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-30 01:10:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:10:52,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-30 01:10:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:52,299 INFO L225 Difference]: With dead ends: 73 [2020-11-30 01:10:52,300 INFO L226 Difference]: Without dead ends: 64 [2020-11-30 01:10:52,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:10:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-30 01:10:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-11-30 01:10:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 01:10:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-30 01:10:52,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-30 01:10:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:52,304 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-30 01:10:52,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:10:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-30 01:10:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:52,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:52,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:52,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:10:52,516 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-11-30 01:10:52,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:52,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377757067] [2020-11-30 01:10:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:52,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377757067] [2020-11-30 01:10:52,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132058798] [2020-11-30 01:10:52,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:10:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:52,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:52,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:52,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-30 01:10:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152260336] [2020-11-30 01:10:52,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:52,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:52,743 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-30 01:10:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:52,886 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-30 01:10:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 01:10:52,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 01:10:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:52,887 INFO L225 Difference]: With dead ends: 64 [2020-11-30 01:10:52,887 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 01:10:52,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:10:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 01:10:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-30 01:10:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-30 01:10:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-30 01:10:52,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-30 01:10:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:52,901 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-30 01:10:52,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:10:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-30 01:10:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:52,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:52,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:53,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-30 01:10:53,106 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-11-30 01:10:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:53,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36300238] [2020-11-30 01:10:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:53,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36300238] [2020-11-30 01:10:53,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342764485] [2020-11-30 01:10:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:53,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:53,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:10:53,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:53,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:53,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-30 01:10:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468239125] [2020-11-30 01:10:53,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:10:53,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:10:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:10:53,297 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-11-30 01:10:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:53,464 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-11-30 01:10:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:10:53,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 01:10:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:53,466 INFO L225 Difference]: With dead ends: 84 [2020-11-30 01:10:53,466 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 01:10:53,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:10:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 01:10:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-11-30 01:10:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-30 01:10:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-30 01:10:53,470 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-30 01:10:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:53,470 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-30 01:10:53,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:10:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-30 01:10:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:53,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:53,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:53,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 01:10:53,696 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-11-30 01:10:53,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:53,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337371693] [2020-11-30 01:10:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:53,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337371693] [2020-11-30 01:10:53,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579672496] [2020-11-30 01:10:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:53,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:10:53,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:10:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:53,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:53,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 01:10:53,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444823030] [2020-11-30 01:10:53,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:10:53,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:53,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:10:53,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:10:53,940 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-30 01:10:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:54,194 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-11-30 01:10:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 01:10:54,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-30 01:10:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:54,195 INFO L225 Difference]: With dead ends: 78 [2020-11-30 01:10:54,195 INFO L226 Difference]: Without dead ends: 69 [2020-11-30 01:10:54,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:10:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-30 01:10:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-11-30 01:10:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-30 01:10:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-30 01:10:54,199 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-11-30 01:10:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:54,199 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-30 01:10:54,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:10:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-30 01:10:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:10:54,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:54,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:54,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-30 01:10:54,408 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-11-30 01:10:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:54,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749714459] [2020-11-30 01:10:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:54,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749714459] [2020-11-30 01:10:54,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153374435] [2020-11-30 01:10:54,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:54,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:10:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:10:54,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:54,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:54,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:54,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 01:10:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344699053] [2020-11-30 01:10:54,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:10:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:10:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:10:54,637 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-11-30 01:10:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:54,898 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-30 01:10:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:10:54,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-30 01:10:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:54,899 INFO L225 Difference]: With dead ends: 73 [2020-11-30 01:10:54,899 INFO L226 Difference]: Without dead ends: 68 [2020-11-30 01:10:54,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:10:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-30 01:10:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-11-30 01:10:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 01:10:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-30 01:10:54,903 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-30 01:10:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:54,903 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-30 01:10:54,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:10:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-30 01:10:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:10:54,903 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:54,904 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:55,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-30 01:10:55,120 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-11-30 01:10:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:55,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924654418] [2020-11-30 01:10:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924654418] [2020-11-30 01:10:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178346899] [2020-11-30 01:10:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:55,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-30 01:10:55,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:10:55,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:55,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:55,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:55,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 01:10:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729595077] [2020-11-30 01:10:55,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:10:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:10:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:10:55,308 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-30 01:10:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:55,603 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-11-30 01:10:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:10:55,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-30 01:10:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:55,604 INFO L225 Difference]: With dead ends: 71 [2020-11-30 01:10:55,604 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 01:10:55,605 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 [2020-11-30 01:10:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 01:10:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-11-30 01:10:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:10:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-30 01:10:55,608 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-11-30 01:10:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:55,608 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-30 01:10:55,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:10:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-30 01:10:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:10:55,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:55,609 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:55,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:55,824 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-11-30 01:10:55,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:55,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315366521] [2020-11-30 01:10:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315366521] [2020-11-30 01:10:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014013926] [2020-11-30 01:10:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:55,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-30 01:10:55,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:55,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:10:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:56,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-30 01:10:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137635379] [2020-11-30 01:10:56,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:10:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:10:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:10:56,005 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-11-30 01:10:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:56,277 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-30 01:10:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 01:10:56,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-30 01:10:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:56,278 INFO L225 Difference]: With dead ends: 83 [2020-11-30 01:10:56,278 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 01:10:56,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-30 01:10:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 01:10:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-11-30 01:10:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-30 01:10:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-30 01:10:56,281 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-30 01:10:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:56,281 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-30 01:10:56,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:10:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-30 01:10:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:10:56,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:56,282 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:56,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:56,499 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-11-30 01:10:56,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:56,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979563646] [2020-11-30 01:10:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:56,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979563646] [2020-11-30 01:10:56,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227922825] [2020-11-30 01:10:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:10:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:56,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:56,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:56,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-30 01:10:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637616180] [2020-11-30 01:10:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:10:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:10:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:10:56,714 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-30 01:10:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:56,862 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-30 01:10:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:10:56,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-30 01:10:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:56,863 INFO L225 Difference]: With dead ends: 72 [2020-11-30 01:10:56,863 INFO L226 Difference]: Without dead ends: 66 [2020-11-30 01:10:56,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:10:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-30 01:10:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-30 01:10:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 01:10:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-30 01:10:56,866 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-30 01:10:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-30 01:10:56,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:10:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-30 01:10:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:10:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:56,867 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:57,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-30 01:10:57,080 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-11-30 01:10:57,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:57,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562136929] [2020-11-30 01:10:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562136929] [2020-11-30 01:10:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714076664] [2020-11-30 01:10:57,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:57,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:10:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:10:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:57,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:57,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-30 01:10:57,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568299261] [2020-11-30 01:10:57,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:10:57,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:57,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:10:57,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:10:57,309 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-11-30 01:10:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:57,509 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-11-30 01:10:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:10:57,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-30 01:10:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:57,510 INFO L225 Difference]: With dead ends: 96 [2020-11-30 01:10:57,510 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 01:10:57,511 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 [2020-11-30 01:10:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 01:10:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-11-30 01:10:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 01:10:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-30 01:10:57,514 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-30 01:10:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:57,514 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-30 01:10:57,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:10:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-30 01:10:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:10:57,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:57,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:57,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:57,736 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-11-30 01:10:57,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:57,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124918730] [2020-11-30 01:10:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:57,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124918730] [2020-11-30 01:10:57,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502902776] [2020-11-30 01:10:57,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:57,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:10:57,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:10:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:57,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:10:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:57,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:57,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-30 01:10:57,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577550319] [2020-11-30 01:10:57,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:10:57,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:10:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:10:57,950 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-30 01:10:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:58,268 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-11-30 01:10:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 01:10:58,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-30 01:10:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:58,269 INFO L225 Difference]: With dead ends: 88 [2020-11-30 01:10:58,269 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 01:10:58,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:10:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 01:10:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-11-30 01:10:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 01:10:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-11-30 01:10:58,272 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-11-30 01:10:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:58,272 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-11-30 01:10:58,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:10:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-11-30 01:10:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:10:58,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:58,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-30 01:10:58,480 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-11-30 01:10:58,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:58,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120513063] [2020-11-30 01:10:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:58,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120513063] [2020-11-30 01:10:58,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282239437] [2020-11-30 01:10:58,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:58,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:10:58,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:10:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:58,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:58,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:58,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-30 01:10:58,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099063732] [2020-11-30 01:10:58,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:10:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:10:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:10:58,703 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-11-30 01:10:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:59,024 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-30 01:10:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 01:10:59,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-30 01:10:59,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:59,025 INFO L225 Difference]: With dead ends: 83 [2020-11-30 01:10:59,025 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 01:10:59,026 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 [2020-11-30 01:10:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 01:10:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-11-30 01:10:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 01:10:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-30 01:10:59,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-30 01:10:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:59,029 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-30 01:10:59,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:10:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-30 01:10:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:10:59,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:59,029 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:59,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-30 01:10:59,240 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-11-30 01:10:59,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:59,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056010095] [2020-11-30 01:10:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056010095] [2020-11-30 01:10:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660886398] [2020-11-30 01:10:59,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:10:59,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-30 01:10:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:10:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:10:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:10:59,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:10:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:59,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:10:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-30 01:10:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582312926] [2020-11-30 01:10:59,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:10:59,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:10:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:10:59,446 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-30 01:10:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:59,825 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-11-30 01:10:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 01:10:59,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-30 01:10:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:59,826 INFO L225 Difference]: With dead ends: 79 [2020-11-30 01:10:59,826 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 01:10:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-30 01:10:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 01:10:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-11-30 01:10:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-30 01:10:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-30 01:10:59,829 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-11-30 01:10:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:59,830 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-30 01:10:59,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:10:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-30 01:10:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:10:59,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:59,830 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:00,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-30 01:11:00,031 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-11-30 01:11:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:00,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406430929] [2020-11-30 01:11:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:11:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406430929] [2020-11-30 01:11:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747614459] [2020-11-30 01:11:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:11:00,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-30 01:11:00,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:11:00,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:11:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:11:00,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:11:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:11:00,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:11:00,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-30 01:11:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760639551] [2020-11-30 01:11:00,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:11:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:11:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:11:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:11:00,273 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-11-30 01:11:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:11:00,713 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-30 01:11:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-30 01:11:00,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-30 01:11:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:11:00,717 INFO L225 Difference]: With dead ends: 93 [2020-11-30 01:11:00,717 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 01:11:00,718 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 [2020-11-30 01:11:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 01:11:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-11-30 01:11:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 01:11:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-30 01:11:00,721 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-30 01:11:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:11:00,721 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-30 01:11:00,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:11:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-30 01:11:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:11:00,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:11:00,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:11:00,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-30 01:11:00,932 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:11:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:11:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-11-30 01:11:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:11:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400144830] [2020-11-30 01:11:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:11:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:11:00,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:11:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:11:00,951 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:11:00,972 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:11:00,972 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:11:00,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-30 01:11:01,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:11:01 BasicIcfg [2020-11-30 01:11:01,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:11:01,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:11:01,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:11:01,047 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:11:01,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:43" (3/4) ... [2020-11-30 01:11:01,049 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:11:01,116 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d7cf9347-fe60-485a-9e79-7c774039a27e/bin/uautomizer/witness.graphml [2020-11-30 01:11:01,116 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:11:01,117 INFO L168 Benchmark]: Toolchain (without parser) took 18545.43 ms. Allocated memory was 94.4 MB in the beginning and 237.0 MB in the end (delta: 142.6 MB). Free memory was 65.7 MB in the beginning and 186.2 MB in the end (delta: -120.5 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,118 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 94.4 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:11:01,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 610.46 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 53.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.64 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 51.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,119 INFO L168 Benchmark]: Boogie Preprocessor took 59.04 ms. Allocated memory is still 94.4 MB. Free memory was 51.5 MB in the beginning and 50.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:11:01,119 INFO L168 Benchmark]: RCFGBuilder took 471.92 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 50.2 MB in the beginning and 81.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,120 INFO L168 Benchmark]: TraceAbstraction took 17258.39 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 80.5 MB in the beginning and 191.4 MB in the end (delta: -110.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,120 INFO L168 Benchmark]: Witness Printer took 69.44 ms. Allocated memory is still 237.0 MB. Free memory was 191.4 MB in the beginning and 186.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:11:01,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 94.4 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 610.46 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 53.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.64 ms. Allocated memory is still 94.4 MB. Free memory was 53.2 MB in the beginning and 51.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.04 ms. Allocated memory is still 94.4 MB. Free memory was 51.5 MB in the beginning and 50.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 471.92 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 50.2 MB in the beginning and 81.1 MB in the end (delta: -30.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17258.39 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 80.5 MB in the beginning and 191.4 MB in the end (delta: -110.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Witness Printer took 69.44 ms. Allocated memory is still 237.0 MB. Free memory was 191.4 MB in the beginning and 186.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 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 - CounterExampleResult [Line: 693]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L693] COND FALSE 0 !(0) [L693] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.0s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 380 SDtfs, 1091 SDslu, 1156 SDs, 0 SdLazy, 1283 SolverSat, 611 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 669 GetRequests, 229 SyntacticMatches, 17 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 398 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 632 NumberOfCodeBlocks, 632 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 568 ConstructedInterpolants, 0 QuantifiedInterpolants, 32282 SizeOfPredicates, 123 NumberOfNonLiveVariables, 2160 ConjunctsInSsa, 206 ConjunctsInUnsatCore, 46 InterpolantComputations, 6 PerfectInterpolantSequences, 0/280 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 incorrect! Received shutdown request...