/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:17:56,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:17:56,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:17:56,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:17:56,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:17:56,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:17:56,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:17:56,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:17:56,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:17:56,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:17:56,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:17:56,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:17:56,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:17:56,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:17:56,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:17:56,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:17:56,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:17:56,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:17:56,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:17:56,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:17:56,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:17:56,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:17:56,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:17:56,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:17:56,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:17:56,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:17:56,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:17:56,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:17:56,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:17:56,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:17:56,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:17:56,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:17:56,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:17:56,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:17:56,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:17:56,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:17:56,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:17:56,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:17:56,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:17:56,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:17:56,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:17:56,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-11-11 21:17:56,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:17:56,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:17:56,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:17:56,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:17:56,334 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:17:56,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:17:56,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:17:56,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:17:56,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:17:56,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:17:56,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:17:56,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:17:56,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:17:56,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:17:56,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:17:56,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:17:56,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:17:56,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:17:56,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:17:56,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:17:56,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:17:56,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:17:56,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:17:56,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:17:56,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:17:56,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:17:56,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:17:56,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:17:56,340 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:17:56,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:17:56,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:17:56,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:17:56,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:17:56,809 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:17:56,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-11-11 21:17:56,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a86224c7/7b6c3c517aee41519e8470da9c26edc4/FLAGc0a5a9b9d [2020-11-11 21:17:57,640 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:17:57,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-11-11 21:17:57,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a86224c7/7b6c3c517aee41519e8470da9c26edc4/FLAGc0a5a9b9d [2020-11-11 21:17:57,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a86224c7/7b6c3c517aee41519e8470da9c26edc4 [2020-11-11 21:17:57,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:17:57,934 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:17:57,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:57,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:17:57,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:17:57,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:57" (1/1) ... [2020-11-11 21:17:57,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d90075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:57, skipping insertion in model container [2020-11-11 21:17:57,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:17:57" (1/1) ... [2020-11-11 21:17:57,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:17:57,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:17:58,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:58,484 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:17:58,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:17:58,689 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:17:58,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58 WrapperNode [2020-11-11 21:17:58,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:17:58,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:58,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:17:58,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:17:58,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:17:58,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:17:58,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:17:58,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:17:58,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... [2020-11-11 21:17:58,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:17:58,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:17:58,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:17:58,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:17:58,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:17:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:17:58,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:17:58,873 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:17:58,874 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:17:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:17:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:17:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:17:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:17:58,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:17:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:17:58,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:17:58,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:17:58,877 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:17:59,395 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:17:59,395 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:17:59,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:59 BoogieIcfgContainer [2020-11-11 21:17:59,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:17:59,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:17:59,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:17:59,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:17:59,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:17:57" (1/3) ... [2020-11-11 21:17:59,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd961ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:59, skipping insertion in model container [2020-11-11 21:17:59,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:17:58" (2/3) ... [2020-11-11 21:17:59,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd961ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:17:59, skipping insertion in model container [2020-11-11 21:17:59,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:17:59" (3/3) ... [2020-11-11 21:17:59,408 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-11-11 21:17:59,425 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:17:59,425 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:17:59,429 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:17:59,430 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:17:59,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,477 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,478 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,478 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,478 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,479 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,479 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,479 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,480 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,480 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,481 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,482 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,482 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,482 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,482 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,483 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,483 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,483 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,483 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,484 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,484 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,484 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,484 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,485 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,485 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,485 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,485 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,486 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,488 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,488 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,488 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,488 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,489 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,489 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,489 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,489 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,490 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,491 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,500 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,504 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,504 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,504 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,505 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,505 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,505 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,510 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:17:59,523 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:17:59,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:17:59,576 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:17:59,576 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:17:59,576 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:17:59,576 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:17:59,576 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:17:59,576 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:17:59,577 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:17:59,577 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:17:59,593 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:17:59,595 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:59,599 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:59,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-11-11 21:17:59,673 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-11-11 21:17:59,673 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:17:59,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-11-11 21:17:59,686 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-11-11 21:18:02,344 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-11 21:18:02,516 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-11 21:18:02,889 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:18:03,041 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:18:03,356 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-11 21:18:03,502 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-11 21:18:03,555 INFO L131 LiptonReduction]: Checked pairs total: 1164 [2020-11-11 21:18:03,555 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-11-11 21:18:03,561 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-11 21:18:03,571 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:18:03,579 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:03,580 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:18:03,581 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -542457276, now seen corresponding path program 1 times [2020-11-11 21:18:03,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:03,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893639199] [2020-11-11 21:18:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:03,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893639199] [2020-11-11 21:18:03,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:18:03,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:18:03,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264981603] [2020-11-11 21:18:03,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:18:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:18:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:18:03,864 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:03,961 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-11-11 21:18:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:18:03,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2020-11-11 21:18:03,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:03,975 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:18:03,975 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:18:03,977 INFO L749 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 [2020-11-11 21:18:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:18:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-11-11 21:18:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-11-11 21:18:04,020 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-11-11 21:18:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:04,021 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-11-11 21:18:04,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-11-11 21:18:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:18:04,022 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:04,022 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:04,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:18:04,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1570409437, now seen corresponding path program 1 times [2020-11-11 21:18:04,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:04,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945501770] [2020-11-11 21:18:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945501770] [2020-11-11 21:18:04,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:18:04,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:18:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125061323] [2020-11-11 21:18:04,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:18:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:18:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:18:04,155 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:04,216 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-11-11 21:18:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:18:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:18:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:04,219 INFO L225 Difference]: With dead ends: 80 [2020-11-11 21:18:04,219 INFO L226 Difference]: Without dead ends: 75 [2020-11-11 21:18:04,220 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-11 21:18:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-11 21:18:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-11-11 21:18:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 54 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-11-11 21:18:04,231 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-11-11 21:18:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:04,232 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-11-11 21:18:04,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-11-11 21:18:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:18:04,233 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:04,233 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:04,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:18:04,234 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1610121801, now seen corresponding path program 1 times [2020-11-11 21:18:04,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:04,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135941046] [2020-11-11 21:18:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:04,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135941046] [2020-11-11 21:18:04,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:18:04,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:18:04,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217015908] [2020-11-11 21:18:04,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:18:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:18:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:18:04,311 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:04,384 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-11-11 21:18:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:18:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:18:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:04,386 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:18:04,386 INFO L226 Difference]: Without dead ends: 77 [2020-11-11 21:18:04,387 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-11 21:18:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-11 21:18:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-11-11 21:18:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-11-11 21:18:04,399 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-11-11 21:18:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:04,399 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-11-11 21:18:04,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-11-11 21:18:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:18:04,401 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:04,404 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:04,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:18:04,404 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1438024966, now seen corresponding path program 2 times [2020-11-11 21:18:04,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:04,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632367737] [2020-11-11 21:18:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:04,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632367737] [2020-11-11 21:18:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923974450] [2020-11-11 21:18:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:04,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:04,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:18:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:04,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:04,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:04,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-11-11 21:18:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470608915] [2020-11-11 21:18:04,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:18:04,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:18:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:18:04,889 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:04,985 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-11-11 21:18:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:18:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2020-11-11 21:18:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:04,987 INFO L225 Difference]: With dead ends: 101 [2020-11-11 21:18:04,988 INFO L226 Difference]: Without dead ends: 96 [2020-11-11 21:18:04,988 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-11 21:18:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-11-11 21:18:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.4714285714285715) internal successors, (173), 70 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-11-11 21:18:05,000 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-11-11 21:18:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:05,000 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-11-11 21:18:05,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-11-11 21:18:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-11 21:18:05,002 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:05,002 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:05,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:05,216 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1625858085, now seen corresponding path program 2 times [2020-11-11 21:18:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:05,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409571961] [2020-11-11 21:18:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:05,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409571961] [2020-11-11 21:18:05,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832561397] [2020-11-11 21:18:05,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:05,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:18:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:05,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:05,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:05,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-11 21:18:05,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773403423] [2020-11-11 21:18:05,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:18:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:18:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:18:05,494 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:05,615 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-11 21:18:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:18:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2020-11-11 21:18:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:05,617 INFO L225 Difference]: With dead ends: 96 [2020-11-11 21:18:05,617 INFO L226 Difference]: Without dead ends: 90 [2020-11-11 21:18:05,618 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:18:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-11 21:18:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-11 21:18:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-11-11 21:18:05,626 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-11-11 21:18:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:05,627 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-11-11 21:18:05,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-11-11 21:18:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:18:05,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:05,629 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:05,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:05,838 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1647573872, now seen corresponding path program 1 times [2020-11-11 21:18:05,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:05,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692314454] [2020-11-11 21:18:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:05,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692314454] [2020-11-11 21:18:05,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:18:05,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:18:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801820109] [2020-11-11 21:18:05,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:18:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:18:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:18:05,931 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:06,050 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-11-11 21:18:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:18:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:18:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:06,053 INFO L225 Difference]: With dead ends: 103 [2020-11-11 21:18:06,054 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:18:06,055 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:18:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:18:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-11-11 21:18:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 77 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-11-11 21:18:06,073 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-11-11 21:18:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:06,076 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-11-11 21:18:06,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-11-11 21:18:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:18:06,078 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:06,078 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:06,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 21:18:06,082 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1647545042, now seen corresponding path program 2 times [2020-11-11 21:18:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:06,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824197422] [2020-11-11 21:18:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:06,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824197422] [2020-11-11 21:18:06,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:18:06,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:18:06,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331386994] [2020-11-11 21:18:06,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:18:06,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:18:06,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:18:06,201 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:06,312 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-11-11 21:18:06,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 21:18:06,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:18:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:06,314 INFO L225 Difference]: With dead ends: 103 [2020-11-11 21:18:06,314 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:18:06,315 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:18:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:18:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-11 21:18:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3950617283950617) internal successors, (194), 81 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-11-11 21:18:06,336 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-11-11 21:18:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:06,336 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-11-11 21:18:06,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-11-11 21:18:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:18:06,340 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:06,340 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:06,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 21:18:06,341 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1629073661, now seen corresponding path program 3 times [2020-11-11 21:18:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:06,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488956482] [2020-11-11 21:18:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:06,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488956482] [2020-11-11 21:18:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402409467] [2020-11-11 21:18:06,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:06,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:06,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:06,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:06,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-11-11 21:18:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587649654] [2020-11-11 21:18:06,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:18:06,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:18:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:18:06,607 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:06,720 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-11-11 21:18:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:18:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:06,721 INFO L225 Difference]: With dead ends: 122 [2020-11-11 21:18:06,722 INFO L226 Difference]: Without dead ends: 117 [2020-11-11 21:18:06,722 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:18:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-11 21:18:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-11-11 21:18:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.471264367816092) internal successors, (215), 87 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-11-11 21:18:06,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-11-11 21:18:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:06,730 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-11-11 21:18:06,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-11-11 21:18:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:18:06,731 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:06,732 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:06,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:06,948 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1137980553, now seen corresponding path program 3 times [2020-11-11 21:18:06,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:06,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235655648] [2020-11-11 21:18:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:07,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235655648] [2020-11-11 21:18:07,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897905086] [2020-11-11 21:18:07,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:07,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:07,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:07,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:07,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:07,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:07,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900386417] [2020-11-11 21:18:07,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:07,212 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:07,372 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-11-11 21:18:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:18:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:07,374 INFO L225 Difference]: With dead ends: 121 [2020-11-11 21:18:07,374 INFO L226 Difference]: Without dead ends: 115 [2020-11-11 21:18:07,374 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:18:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-11 21:18:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-11-11 21:18:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-11 21:18:07,390 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-11-11 21:18:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:07,390 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-11 21:18:07,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-11 21:18:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:07,391 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:07,391 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:07,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:07,610 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 464815054, now seen corresponding path program 3 times [2020-11-11 21:18:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:07,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095040211] [2020-11-11 21:18:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:07,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095040211] [2020-11-11 21:18:07,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336080941] [2020-11-11 21:18:07,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:07,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:07,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:07,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:07,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:07,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112868653] [2020-11-11 21:18:07,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:07,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:07,858 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:08,081 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-11-11 21:18:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:08,083 INFO L225 Difference]: With dead ends: 121 [2020-11-11 21:18:08,083 INFO L226 Difference]: Without dead ends: 116 [2020-11-11 21:18:08,084 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:18:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-11 21:18:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-11-11 21:18:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-11 21:18:08,099 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-11-11 21:18:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:08,100 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-11 21:18:08,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-11 21:18:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:08,101 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:08,101 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 21:18:08,314 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 464843884, now seen corresponding path program 4 times [2020-11-11 21:18:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:08,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917839622] [2020-11-11 21:18:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917839622] [2020-11-11 21:18:08,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703340414] [2020-11-11 21:18:08,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:08,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:08,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:08,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:08,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905774811] [2020-11-11 21:18:08,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:08,574 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:08,862 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-11-11 21:18:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:08,864 INFO L225 Difference]: With dead ends: 131 [2020-11-11 21:18:08,864 INFO L226 Difference]: Without dead ends: 126 [2020-11-11 21:18:08,865 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:18:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-11 21:18:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-11-11 21:18:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.521276595744681) internal successors, (237), 94 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-11-11 21:18:08,873 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-11-11 21:18:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:08,874 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-11-11 21:18:08,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-11-11 21:18:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:08,875 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:08,875 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:09,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:09,088 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash 464844845, now seen corresponding path program 5 times [2020-11-11 21:18:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:09,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332771896] [2020-11-11 21:18:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:09,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332771896] [2020-11-11 21:18:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965064607] [2020-11-11 21:18:09,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:09,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:09,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:09,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:09,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:09,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:09,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31422197] [2020-11-11 21:18:09,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:09,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:09,325 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:09,516 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-11-11 21:18:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:09,518 INFO L225 Difference]: With dead ends: 126 [2020-11-11 21:18:09,518 INFO L226 Difference]: Without dead ends: 121 [2020-11-11 21:18:09,519 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:18:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-11 21:18:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-11-11 21:18:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.478723404255319) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-11-11 21:18:09,524 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-11-11 21:18:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:09,524 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-11-11 21:18:09,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-11-11 21:18:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:09,525 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:09,526 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:09,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:09,727 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash 465737614, now seen corresponding path program 6 times [2020-11-11 21:18:09,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:09,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742897176] [2020-11-11 21:18:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742897176] [2020-11-11 21:18:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425340269] [2020-11-11 21:18:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:09,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:09,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:09,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:09,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:09,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072462666] [2020-11-11 21:18:09,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:09,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:09,982 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:10,207 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-11-11 21:18:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:10,210 INFO L225 Difference]: With dead ends: 127 [2020-11-11 21:18:10,211 INFO L226 Difference]: Without dead ends: 122 [2020-11-11 21:18:10,211 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:18:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-11 21:18:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-11-11 21:18:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.5104166666666665) internal successors, (241), 96 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-11-11 21:18:10,222 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-11-11 21:18:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:10,223 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-11-11 21:18:10,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-11-11 21:18:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:10,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:10,224 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:10,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 21:18:10,438 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 465738575, now seen corresponding path program 7 times [2020-11-11 21:18:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:10,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645444659] [2020-11-11 21:18:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:10,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645444659] [2020-11-11 21:18:10,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310677481] [2020-11-11 21:18:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:10,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:10,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074518647] [2020-11-11 21:18:10,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:10,692 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:10,946 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-11-11 21:18:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:10,948 INFO L225 Difference]: With dead ends: 141 [2020-11-11 21:18:10,948 INFO L226 Difference]: Without dead ends: 136 [2020-11-11 21:18:10,949 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:18:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-11 21:18:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-11-11 21:18:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.4842105263157896) internal successors, (236), 95 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-11-11 21:18:10,954 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-11-11 21:18:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:10,955 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-11-11 21:18:10,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-11-11 21:18:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:10,955 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:10,956 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:11,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:11,169 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 465767405, now seen corresponding path program 8 times [2020-11-11 21:18:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:11,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455238020] [2020-11-11 21:18:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455238020] [2020-11-11 21:18:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613898614] [2020-11-11 21:18:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:11,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:11,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:18:11,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:11,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:11,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:11,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-11 21:18:11,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164830827] [2020-11-11 21:18:11,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:18:11,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:11,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:18:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:18:11,482 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:11,725 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-11-11 21:18:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:18:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:11,727 INFO L225 Difference]: With dead ends: 131 [2020-11-11 21:18:11,727 INFO L226 Difference]: Without dead ends: 126 [2020-11-11 21:18:11,728 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:18:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-11 21:18:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-11-11 21:18:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.381443298969072) internal successors, (231), 97 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-11-11 21:18:11,738 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-11-11 21:18:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:11,738 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-11-11 21:18:11,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-11-11 21:18:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:11,739 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:11,739 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:11,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:18:11,952 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1038351386, now seen corresponding path program 4 times [2020-11-11 21:18:11,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:11,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725936189] [2020-11-11 21:18:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:12,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725936189] [2020-11-11 21:18:12,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558578094] [2020-11-11 21:18:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:12,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:12,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:12,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:12,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:12,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-11 21:18:12,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6703780] [2020-11-11 21:18:12,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:18:12,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:18:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:18:12,272 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:12,420 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-11-11 21:18:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:12,422 INFO L225 Difference]: With dead ends: 143 [2020-11-11 21:18:12,422 INFO L226 Difference]: Without dead ends: 138 [2020-11-11 21:18:12,424 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:18:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-11 21:18:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-11-11 21:18:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.4711538461538463) internal successors, (257), 104 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-11 21:18:12,432 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-11-11 21:18:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:12,433 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-11 21:18:12,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-11 21:18:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:18:12,434 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:12,434 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:12,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:18:12,635 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -917632411, now seen corresponding path program 4 times [2020-11-11 21:18:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:12,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462469802] [2020-11-11 21:18:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462469802] [2020-11-11 21:18:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261523574] [2020-11-11 21:18:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:12,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:12,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:12,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:12,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:12,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062053941] [2020-11-11 21:18:12,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:12,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:12,954 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:13,142 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-11-11 21:18:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:18:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:13,143 INFO L225 Difference]: With dead ends: 147 [2020-11-11 21:18:13,144 INFO L226 Difference]: Without dead ends: 141 [2020-11-11 21:18:13,144 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:18:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-11 21:18:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-11-11 21:18:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.517857142857143) internal successors, (282), 112 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-11-11 21:18:13,149 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-11-11 21:18:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:13,150 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-11-11 21:18:13,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-11-11 21:18:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:13,150 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:13,150 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:13,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:18:13,363 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1524362320, now seen corresponding path program 9 times [2020-11-11 21:18:13,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:13,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324734954] [2020-11-11 21:18:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324734954] [2020-11-11 21:18:13,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121889360] [2020-11-11 21:18:13,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:13,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:13,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:13,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:13,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:13,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:13,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:13,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133929712] [2020-11-11 21:18:13,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:13,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:13,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:13,643 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:13,969 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-11-11 21:18:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:13,971 INFO L225 Difference]: With dead ends: 152 [2020-11-11 21:18:13,971 INFO L226 Difference]: Without dead ends: 147 [2020-11-11 21:18:13,972 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:18:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-11 21:18:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-11-11 21:18:13,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.4954954954954953) internal successors, (277), 111 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-11-11 21:18:13,977 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-11-11 21:18:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:13,977 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-11-11 21:18:13,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-11-11 21:18:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:13,978 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:13,978 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:14,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:18:14,186 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1524391150, now seen corresponding path program 10 times [2020-11-11 21:18:14,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:14,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216310894] [2020-11-11 21:18:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:14,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216310894] [2020-11-11 21:18:14,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613618718] [2020-11-11 21:18:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:14,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:14,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:18,656 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-11 21:18:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:18,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:18,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-11 21:18:18,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610462643] [2020-11-11 21:18:18,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:18:18,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:18,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:18:18,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-11-11 21:18:18,660 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:22,956 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:18:25,259 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-11 21:18:31,500 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-11 21:18:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:46,074 INFO L93 Difference]: Finished difference Result 174 states and 412 transitions. [2020-11-11 21:18:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:46,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:46,087 INFO L225 Difference]: With dead ends: 174 [2020-11-11 21:18:46,087 INFO L226 Difference]: Without dead ends: 169 [2020-11-11 21:18:46,087 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=209, Invalid=439, Unknown=2, NotChecked=0, Total=650 [2020-11-11 21:18:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-11 21:18:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2020-11-11 21:18:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.5135135135135136) internal successors, (279), 111 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-11-11 21:18:46,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-11-11 21:18:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:46,093 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-11-11 21:18:46,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-11-11 21:18:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:46,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:46,094 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:46,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:46,302 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1524392111, now seen corresponding path program 11 times [2020-11-11 21:18:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:46,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794996336] [2020-11-11 21:18:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:46,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794996336] [2020-11-11 21:18:46,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145017890] [2020-11-11 21:18:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:46,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:46,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:46,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:46,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:46,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:46,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417290037] [2020-11-11 21:18:46,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:46,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:46,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:46,609 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:46,943 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-11-11 21:18:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:46,947 INFO L225 Difference]: With dead ends: 148 [2020-11-11 21:18:46,947 INFO L226 Difference]: Without dead ends: 143 [2020-11-11 21:18:46,948 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:18:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-11 21:18:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-11-11 21:18:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.4909090909090907) internal successors, (274), 110 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-11-11 21:18:46,953 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-11-11 21:18:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:46,953 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-11-11 21:18:46,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-11-11 21:18:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:46,956 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:46,957 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:47,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:47,169 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1525284880, now seen corresponding path program 12 times [2020-11-11 21:18:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:47,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436673236] [2020-11-11 21:18:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436673236] [2020-11-11 21:18:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751575635] [2020-11-11 21:18:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:47,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:47,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:47,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:47,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:47,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:47,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371949906] [2020-11-11 21:18:47,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:47,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:47,456 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:47,894 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-11-11 21:18:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:47,896 INFO L225 Difference]: With dead ends: 167 [2020-11-11 21:18:47,896 INFO L226 Difference]: Without dead ends: 162 [2020-11-11 21:18:47,897 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:18:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-11 21:18:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-11-11 21:18:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.5398230088495577) internal successors, (287), 113 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-11-11 21:18:47,905 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-11-11 21:18:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:47,906 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-11-11 21:18:47,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-11-11 21:18:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:47,908 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:47,908 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:48,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:48,112 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1525285841, now seen corresponding path program 13 times [2020-11-11 21:18:48,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:48,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871795135] [2020-11-11 21:18:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871795135] [2020-11-11 21:18:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520098374] [2020-11-11 21:18:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:48,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:48,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:48,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:48,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697775369] [2020-11-11 21:18:48,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:48,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:48,383 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:48,854 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-11-11 21:18:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:18:48,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:48,856 INFO L225 Difference]: With dead ends: 177 [2020-11-11 21:18:48,856 INFO L226 Difference]: Without dead ends: 169 [2020-11-11 21:18:48,857 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:18:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-11 21:18:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-11-11 21:18:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.504424778761062) internal successors, (283), 113 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-11-11 21:18:48,862 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-11-11 21:18:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:48,863 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-11-11 21:18:48,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-11-11 21:18:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:48,864 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:48,864 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 21:18:49,077 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1525314671, now seen corresponding path program 14 times [2020-11-11 21:18:49,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:49,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949166349] [2020-11-11 21:18:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:49,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949166349] [2020-11-11 21:18:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787401214] [2020-11-11 21:18:49,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:49,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:49,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:49,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:49,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:49,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833712941] [2020-11-11 21:18:49,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:49,414 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:49,884 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-11-11 21:18:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:49,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:49,887 INFO L225 Difference]: With dead ends: 165 [2020-11-11 21:18:49,887 INFO L226 Difference]: Without dead ends: 160 [2020-11-11 21:18:49,888 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:18:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-11 21:18:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-11-11 21:18:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.4774774774774775) internal successors, (275), 111 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-11-11 21:18:49,893 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-11-11 21:18:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:49,894 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-11-11 21:18:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-11-11 21:18:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:49,894 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:49,895 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:18:50,108 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1552990510, now seen corresponding path program 15 times [2020-11-11 21:18:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850239301] [2020-11-11 21:18:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:50,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850239301] [2020-11-11 21:18:50,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784022652] [2020-11-11 21:18:50,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:50,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:18:50,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:50,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:50,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:50,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:50,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546870113] [2020-11-11 21:18:50,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:50,382 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:50,672 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-11-11 21:18:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:18:50,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:50,674 INFO L225 Difference]: With dead ends: 158 [2020-11-11 21:18:50,674 INFO L226 Difference]: Without dead ends: 153 [2020-11-11 21:18:50,675 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:18:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-11 21:18:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-11-11 21:18:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5304347826086957) internal successors, (291), 115 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-11-11 21:18:50,681 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-11-11 21:18:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-11-11 21:18:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-11-11 21:18:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:50,683 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:50,683 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:50,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:18:50,896 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1552991471, now seen corresponding path program 16 times [2020-11-11 21:18:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:50,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987625300] [2020-11-11 21:18:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:50,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987625300] [2020-11-11 21:18:50,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736455632] [2020-11-11 21:18:50,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-11 21:18:51,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:18:51,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:51,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:51,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:51,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535345198] [2020-11-11 21:18:51,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:51,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:51,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:51,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:51,156 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:51,646 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-11-11 21:18:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:51,649 INFO L225 Difference]: With dead ends: 185 [2020-11-11 21:18:51,649 INFO L226 Difference]: Without dead ends: 177 [2020-11-11 21:18:51,650 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:18:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-11-11 21:18:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-11-11 21:18:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.508771929824561) internal successors, (286), 114 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-11-11 21:18:51,655 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-11-11 21:18:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:51,656 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-11-11 21:18:51,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-11-11 21:18:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:51,656 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:51,657 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:51,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:18:51,869 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1553020301, now seen corresponding path program 17 times [2020-11-11 21:18:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:51,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448505725] [2020-11-11 21:18:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:51,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448505725] [2020-11-11 21:18:51,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432991031] [2020-11-11 21:18:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:52,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:52,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:52,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:52,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420274119] [2020-11-11 21:18:52,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:52,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:52,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:52,135 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:52,594 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-11-11 21:18:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:18:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:52,596 INFO L225 Difference]: With dead ends: 194 [2020-11-11 21:18:52,596 INFO L226 Difference]: Without dead ends: 186 [2020-11-11 21:18:52,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:18:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-11 21:18:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-11-11 21:18:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.439655172413793) internal successors, (283), 116 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-11-11 21:18:52,602 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-11-11 21:18:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:52,602 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-11-11 21:18:52,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-11-11 21:18:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:52,603 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:52,604 INFO L494 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:52,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:18:52,804 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1553021262, now seen corresponding path program 18 times [2020-11-11 21:18:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:52,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303098] [2020-11-11 21:18:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:52,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303098] [2020-11-11 21:18:52,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715316109] [2020-11-11 21:18:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:52,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:18:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:18:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:53,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:53,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:53,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-11 21:18:53,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249000303] [2020-11-11 21:18:53,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:18:53,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:18:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:18:53,060 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:53,463 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-11-11 21:18:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:18:53,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:53,466 INFO L225 Difference]: With dead ends: 172 [2020-11-11 21:18:53,466 INFO L226 Difference]: Without dead ends: 167 [2020-11-11 21:18:53,467 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:18:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-11 21:18:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-11-11 21:18:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.3716814159292037) internal successors, (268), 113 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-11-11 21:18:53,472 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-11-11 21:18:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:53,472 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-11-11 21:18:53,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-11-11 21:18:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:53,473 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:53,473 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:53,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:53,687 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2124149219, now seen corresponding path program 5 times [2020-11-11 21:18:53,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:53,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837634596] [2020-11-11 21:18:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837634596] [2020-11-11 21:18:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835197372] [2020-11-11 21:18:53,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:53,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:18:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:18:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:54,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:54,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:54,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-11 21:18:54,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381847805] [2020-11-11 21:18:54,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:18:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:54,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:18:54,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:18:54,043 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:54,280 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-11-11 21:18:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:54,282 INFO L225 Difference]: With dead ends: 164 [2020-11-11 21:18:54,282 INFO L226 Difference]: Without dead ends: 159 [2020-11-11 21:18:54,283 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:18:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-11 21:18:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-11-11 21:18:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-11-11 21:18:54,289 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-11-11 21:18:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:54,290 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-11-11 21:18:54,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-11-11 21:18:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:18:54,290 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:54,291 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:54,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 21:18:54,503 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1618192695, now seen corresponding path program 5 times [2020-11-11 21:18:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:54,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706310747] [2020-11-11 21:18:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706310747] [2020-11-11 21:18:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778358716] [2020-11-11 21:18:54,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:54,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:18:54,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:18:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:54,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:54,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:54,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:18:54,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081726186] [2020-11-11 21:18:54,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:18:54,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:54,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:18:54,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:18:54,858 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:55,084 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-11-11 21:18:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:55,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:18:55,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:55,086 INFO L225 Difference]: With dead ends: 173 [2020-11-11 21:18:55,086 INFO L226 Difference]: Without dead ends: 167 [2020-11-11 21:18:55,088 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:18:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-11 21:18:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-11-11 21:18:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:18:55,093 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-11-11 21:18:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:55,093 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:18:55,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:18:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:18:55,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:55,094 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:55,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:18:55,307 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash 10589198, now seen corresponding path program 19 times [2020-11-11 21:18:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:55,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721073737] [2020-11-11 21:18:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721073737] [2020-11-11 21:18:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092302908] [2020-11-11 21:18:55,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:18:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:55,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:18:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:55,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:55,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:18:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319630779] [2020-11-11 21:18:55,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:18:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:55,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:18:55,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:18:55,628 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:18:56,034 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-11 21:18:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:18:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:18:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:18:56,038 INFO L225 Difference]: With dead ends: 183 [2020-11-11 21:18:56,039 INFO L226 Difference]: Without dead ends: 178 [2020-11-11 21:18:56,039 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:18:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-11 21:18:56,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-11-11 21:18:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5153846153846153) internal successors, (327), 130 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:56,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-11-11 21:18:56,045 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-11-11 21:18:56,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:18:56,045 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-11-11 21:18:56,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:18:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-11-11 21:18:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:18:56,046 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:18:56,046 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:18:56,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:56,258 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:18:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:18:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash 10618028, now seen corresponding path program 20 times [2020-11-11 21:18:56,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:18:56,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798053967] [2020-11-11 21:18:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:18:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:18:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:56,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798053967] [2020-11-11 21:18:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819858271] [2020-11-11 21:18:56,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:18:56,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:18:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:18:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:18:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:18:56,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:18:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:18:58,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:18:58,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-11 21:18:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789619848] [2020-11-11 21:18:58,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:18:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:18:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:18:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-11-11 21:18:58,693 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:01,167 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-11-11 21:19:06,041 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-11-11 21:19:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:17,808 INFO L93 Difference]: Finished difference Result 212 states and 502 transitions. [2020-11-11 21:19:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:19:17,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:17,815 INFO L225 Difference]: With dead ends: 212 [2020-11-11 21:19:17,816 INFO L226 Difference]: Without dead ends: 207 [2020-11-11 21:19:17,816 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=275, Invalid=593, Unknown=2, NotChecked=0, Total=870 [2020-11-11 21:19:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-11 21:19:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-11-11 21:19:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5307692307692307) internal successors, (329), 130 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-11-11 21:19:17,822 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-11-11 21:19:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:17,822 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-11-11 21:19:17,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-11-11 21:19:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:17,823 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:17,823 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:18,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:18,036 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:18,036 INFO L82 PathProgramCache]: Analyzing trace with hash 10618989, now seen corresponding path program 21 times [2020-11-11 21:19:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:18,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816852125] [2020-11-11 21:19:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816852125] [2020-11-11 21:19:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113433259] [2020-11-11 21:19:18,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:18,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:19:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:18,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:18,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:18,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:18,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351176468] [2020-11-11 21:19:18,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:18,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:18,367 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:18,828 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-11-11 21:19:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:19:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:18,832 INFO L225 Difference]: With dead ends: 184 [2020-11-11 21:19:18,832 INFO L226 Difference]: Without dead ends: 179 [2020-11-11 21:19:18,833 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:19:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-11 21:19:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-11-11 21:19:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.4921875) internal successors, (319), 128 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-11-11 21:19:18,840 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-11-11 21:19:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:18,840 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-11-11 21:19:18,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-11-11 21:19:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:18,841 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:18,841 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:19,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 21:19:19,042 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 11511758, now seen corresponding path program 22 times [2020-11-11 21:19:19,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:19,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968365542] [2020-11-11 21:19:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:19,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968365542] [2020-11-11 21:19:19,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624641317] [2020-11-11 21:19:19,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:19,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:19,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:19,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:19,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:19,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:19,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703078347] [2020-11-11 21:19:19,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:19,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:19,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:19,427 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:20,124 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-11-11 21:19:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:19:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:20,127 INFO L225 Difference]: With dead ends: 207 [2020-11-11 21:19:20,127 INFO L226 Difference]: Without dead ends: 202 [2020-11-11 21:19:20,128 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:19:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-11 21:19:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-11-11 21:19:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:20,133 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-11 21:19:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:20,133 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:20,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:20,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:20,134 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:20,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:20,346 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 11512719, now seen corresponding path program 23 times [2020-11-11 21:19:20,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146669049] [2020-11-11 21:19:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:20,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146669049] [2020-11-11 21:19:20,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175352021] [2020-11-11 21:19:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:20,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:20,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:20,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:20,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:20,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:20,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:20,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:20,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194348722] [2020-11-11 21:19:20,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:20,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:20,740 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:21,468 INFO L93 Difference]: Finished difference Result 215 states and 517 transitions. [2020-11-11 21:19:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:21,471 INFO L225 Difference]: With dead ends: 215 [2020-11-11 21:19:21,471 INFO L226 Difference]: Without dead ends: 207 [2020-11-11 21:19:21,472 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-11-11 21:19:21,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-11 21:19:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-11-11 21:19:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5153846153846153) internal successors, (327), 130 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-11-11 21:19:21,478 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-11-11 21:19:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:21,478 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-11-11 21:19:21,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-11-11 21:19:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:21,479 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:21,479 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:21,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 21:19:21,693 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:21,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:21,693 INFO L82 PathProgramCache]: Analyzing trace with hash 11541549, now seen corresponding path program 24 times [2020-11-11 21:19:21,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:21,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586093873] [2020-11-11 21:19:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:21,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586093873] [2020-11-11 21:19:21,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809559538] [2020-11-11 21:19:21,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:21,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:19:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:22,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:22,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:22,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290907774] [2020-11-11 21:19:22,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:22,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:22,180 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:22,860 INFO L93 Difference]: Finished difference Result 204 states and 491 transitions. [2020-11-11 21:19:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:19:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:22,863 INFO L225 Difference]: With dead ends: 204 [2020-11-11 21:19:22,863 INFO L226 Difference]: Without dead ends: 199 [2020-11-11 21:19:22,864 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:19:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-11 21:19:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2020-11-11 21:19:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.4881889763779528) internal successors, (316), 127 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-11-11 21:19:22,875 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-11-11 21:19:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:22,876 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-11-11 21:19:22,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-11-11 21:19:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:22,876 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:22,877 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:23,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:23,090 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 39217388, now seen corresponding path program 25 times [2020-11-11 21:19:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078965119] [2020-11-11 21:19:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:23,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078965119] [2020-11-11 21:19:23,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239049728] [2020-11-11 21:19:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:23,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:23,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:23,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:23,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:23,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142390314] [2020-11-11 21:19:23,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:23,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:23,415 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:24,101 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-11 21:19:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:24,106 INFO L225 Difference]: With dead ends: 203 [2020-11-11 21:19:24,106 INFO L226 Difference]: Without dead ends: 198 [2020-11-11 21:19:24,107 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-11-11 21:19:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-11 21:19:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-11-11 21:19:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.553030303030303) internal successors, (337), 132 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-11-11 21:19:24,112 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-11-11 21:19:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:24,112 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-11-11 21:19:24,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-11-11 21:19:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:24,113 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:24,113 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:24,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 21:19:24,326 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 39218349, now seen corresponding path program 26 times [2020-11-11 21:19:24,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:24,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584820245] [2020-11-11 21:19:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584820245] [2020-11-11 21:19:24,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364703265] [2020-11-11 21:19:24,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:24,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:24,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:24,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:24,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:24,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:24,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079256632] [2020-11-11 21:19:24,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:24,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:24,645 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:25,386 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2020-11-11 21:19:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:25,389 INFO L225 Difference]: With dead ends: 204 [2020-11-11 21:19:25,389 INFO L226 Difference]: Without dead ends: 199 [2020-11-11 21:19:25,390 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-11 21:19:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2020-11-11 21:19:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:25,395 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-11 21:19:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:25,395 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:25,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:25,396 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:25,396 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:25,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 21:19:25,610 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 39247179, now seen corresponding path program 27 times [2020-11-11 21:19:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:25,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426413186] [2020-11-11 21:19:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426413186] [2020-11-11 21:19:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70476049] [2020-11-11 21:19:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:25,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:19:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:25,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:25,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:25,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614962618] [2020-11-11 21:19:25,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:25,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:25,911 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:26,622 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2020-11-11 21:19:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:26,626 INFO L225 Difference]: With dead ends: 221 [2020-11-11 21:19:26,626 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:19:26,627 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:19:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-11-11 21:19:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.564885496183206) internal successors, (336), 131 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-11-11 21:19:26,632 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-11-11 21:19:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:26,632 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-11-11 21:19:26,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-11-11 21:19:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:26,633 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:26,633 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:26,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 21:19:26,846 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash 39248140, now seen corresponding path program 28 times [2020-11-11 21:19:26,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:26,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206142029] [2020-11-11 21:19:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206142029] [2020-11-11 21:19:26,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456370935] [2020-11-11 21:19:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:27,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:27,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:27,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:27,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:27,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454191745] [2020-11-11 21:19:27,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:27,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:27,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:27,157 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:27,850 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-11-11 21:19:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:27,853 INFO L225 Difference]: With dead ends: 211 [2020-11-11 21:19:27,853 INFO L226 Difference]: Without dead ends: 203 [2020-11-11 21:19:27,854 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-11 21:19:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-11 21:19:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5343511450381677) internal successors, (332), 131 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-11 21:19:27,860 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-11 21:19:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:27,860 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-11 21:19:27,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-11 21:19:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:27,861 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:27,861 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:28,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 21:19:28,073 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash 40141870, now seen corresponding path program 29 times [2020-11-11 21:19:28,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:28,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142930835] [2020-11-11 21:19:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142930835] [2020-11-11 21:19:28,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169216957] [2020-11-11 21:19:28,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:28,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:19:28,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:28,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:28,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:28,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:28,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:28,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702375629] [2020-11-11 21:19:28,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:28,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:28,440 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:29,329 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-11-11 21:19:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:29,332 INFO L225 Difference]: With dead ends: 210 [2020-11-11 21:19:29,332 INFO L226 Difference]: Without dead ends: 205 [2020-11-11 21:19:29,333 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-11 21:19:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-11-11 21:19:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.4765625) internal successors, (317), 128 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-11-11 21:19:29,338 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-11-11 21:19:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:29,338 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-11-11 21:19:29,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-11-11 21:19:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:29,339 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:29,339 INFO L494 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:29,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 21:19:29,552 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 898091918, now seen corresponding path program 30 times [2020-11-11 21:19:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:29,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201557117] [2020-11-11 21:19:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:29,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201557117] [2020-11-11 21:19:29,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489864366] [2020-11-11 21:19:29,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:29,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:19:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:29,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:29,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:29,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:29,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37151903] [2020-11-11 21:19:29,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:29,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:29,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:29,846 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:30,237 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-11-11 21:19:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:19:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:30,239 INFO L225 Difference]: With dead ends: 189 [2020-11-11 21:19:30,239 INFO L226 Difference]: Without dead ends: 184 [2020-11-11 21:19:30,240 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:19:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-11 21:19:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-11-11 21:19:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.544776119402985) internal successors, (341), 134 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-11-11 21:19:30,244 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-11-11 21:19:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:30,244 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-11-11 21:19:30,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-11-11 21:19:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:30,244 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:30,244 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:30,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 21:19:30,445 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash 898092879, now seen corresponding path program 31 times [2020-11-11 21:19:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330105348] [2020-11-11 21:19:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330105348] [2020-11-11 21:19:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479563406] [2020-11-11 21:19:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:30,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:30,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:30,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:30,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606170258] [2020-11-11 21:19:30,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:30,786 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:31,452 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-11-11 21:19:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:19:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:31,456 INFO L225 Difference]: With dead ends: 218 [2020-11-11 21:19:31,456 INFO L226 Difference]: Without dead ends: 213 [2020-11-11 21:19:31,457 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-11-11 21:19:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-11 21:19:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-11-11 21:19:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.526315789473684) internal successors, (336), 133 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-11-11 21:19:31,462 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-11-11 21:19:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:31,462 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-11-11 21:19:31,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-11-11 21:19:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:31,463 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:31,463 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:31,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 21:19:31,675 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 898121709, now seen corresponding path program 32 times [2020-11-11 21:19:31,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:31,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110529975] [2020-11-11 21:19:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110529975] [2020-11-11 21:19:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863771157] [2020-11-11 21:19:31,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:31,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:32,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:32,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:32,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:32,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711254078] [2020-11-11 21:19:32,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:32,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:32,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:32,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:32,101 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:32,988 INFO L93 Difference]: Finished difference Result 244 states and 582 transitions. [2020-11-11 21:19:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:32,992 INFO L225 Difference]: With dead ends: 244 [2020-11-11 21:19:32,992 INFO L226 Difference]: Without dead ends: 236 [2020-11-11 21:19:32,993 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-11 21:19:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 137. [2020-11-11 21:19:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.5661764705882355) internal successors, (349), 136 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-11-11 21:19:32,998 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-11-11 21:19:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:32,998 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-11-11 21:19:32,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-11-11 21:19:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:32,999 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:32,999 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:33,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:33,204 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:33,204 INFO L82 PathProgramCache]: Analyzing trace with hash 898122670, now seen corresponding path program 33 times [2020-11-11 21:19:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:33,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386267425] [2020-11-11 21:19:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386267425] [2020-11-11 21:19:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332495874] [2020-11-11 21:19:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:33,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:19:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:33,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:33,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:33,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:33,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:33,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256391140] [2020-11-11 21:19:33,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:33,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:33,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:33,522 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:34,391 INFO L93 Difference]: Finished difference Result 234 states and 555 transitions. [2020-11-11 21:19:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:34,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:34,394 INFO L225 Difference]: With dead ends: 234 [2020-11-11 21:19:34,394 INFO L226 Difference]: Without dead ends: 226 [2020-11-11 21:19:34,396 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:19:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-11 21:19:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 135. [2020-11-11 21:19:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.529850746268657) internal successors, (339), 134 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-11-11 21:19:34,401 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-11-11 21:19:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:34,401 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-11-11 21:19:34,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-11-11 21:19:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:34,402 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:34,402 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:34,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 21:19:34,615 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 899015439, now seen corresponding path program 34 times [2020-11-11 21:19:34,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:34,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066461385] [2020-11-11 21:19:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066461385] [2020-11-11 21:19:34,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132563052] [2020-11-11 21:19:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:34,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:34,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:34,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:34,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:34,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845635330] [2020-11-11 21:19:34,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:34,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:34,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:34,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:34,912 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:35,664 INFO L93 Difference]: Finished difference Result 238 states and 569 transitions. [2020-11-11 21:19:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:35,667 INFO L225 Difference]: With dead ends: 238 [2020-11-11 21:19:35,667 INFO L226 Difference]: Without dead ends: 230 [2020-11-11 21:19:35,667 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-11-11 21:19:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2020-11-11 21:19:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.544776119402985) internal successors, (341), 134 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-11-11 21:19:35,671 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-11-11 21:19:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:35,672 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-11-11 21:19:35,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-11-11 21:19:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:35,672 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:35,673 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:35,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:35,884 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:35,884 INFO L82 PathProgramCache]: Analyzing trace with hash 899016400, now seen corresponding path program 35 times [2020-11-11 21:19:35,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:35,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921368736] [2020-11-11 21:19:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:35,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921368736] [2020-11-11 21:19:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697853083] [2020-11-11 21:19:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:36,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:19:36,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:36,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:36,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:36,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:36,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959756477] [2020-11-11 21:19:36,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:36,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:36,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:36,172 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:36,903 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-11-11 21:19:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:19:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:36,906 INFO L225 Difference]: With dead ends: 239 [2020-11-11 21:19:36,906 INFO L226 Difference]: Without dead ends: 231 [2020-11-11 21:19:36,907 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:19:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-11 21:19:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 132. [2020-11-11 21:19:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4885496183206106) internal successors, (326), 131 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 326 transitions. [2020-11-11 21:19:36,913 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 326 transitions. Word has length 13 [2020-11-11 21:19:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:36,914 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 326 transitions. [2020-11-11 21:19:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 326 transitions. [2020-11-11 21:19:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:36,914 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:36,915 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:37,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 21:19:37,128 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 899045230, now seen corresponding path program 36 times [2020-11-11 21:19:37,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:37,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993450716] [2020-11-11 21:19:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993450716] [2020-11-11 21:19:37,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252016931] [2020-11-11 21:19:37,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:37,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:19:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:19:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:37,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:37,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:37,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-11 21:19:37,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718715122] [2020-11-11 21:19:37,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:19:37,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:37,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:19:37,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:19:37,495 INFO L87 Difference]: Start difference. First operand 132 states and 326 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:38,204 INFO L93 Difference]: Finished difference Result 228 states and 537 transitions. [2020-11-11 21:19:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:19:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:38,207 INFO L225 Difference]: With dead ends: 228 [2020-11-11 21:19:38,208 INFO L226 Difference]: Without dead ends: 220 [2020-11-11 21:19:38,208 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:19:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-11 21:19:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2020-11-11 21:19:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.364341085271318) internal successors, (305), 129 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-11-11 21:19:38,213 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-11-11 21:19:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:38,214 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-11-11 21:19:38,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-11-11 21:19:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:38,214 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:38,224 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,436 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1424143674, now seen corresponding path program 6 times [2020-11-11 21:19:38,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855186327] [2020-11-11 21:19:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855186327] [2020-11-11 21:19:38,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737393555] [2020-11-11 21:19:38,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:38,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:19:38,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:38,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:38,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:38,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:38,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:19:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377750273] [2020-11-11 21:19:38,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:19:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:19:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:19:38,847 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:39,120 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-11-11 21:19:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:39,122 INFO L225 Difference]: With dead ends: 185 [2020-11-11 21:19:39,122 INFO L226 Difference]: Without dead ends: 180 [2020-11-11 21:19:39,123 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:19:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-11 21:19:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-11-11 21:19:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.471014492753623) internal successors, (341), 138 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-11-11 21:19:39,127 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-11-11 21:19:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-11-11 21:19:39,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-11-11 21:19:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:19:39,128 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:39,128 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:39,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 21:19:39,340 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1375607643, now seen corresponding path program 6 times [2020-11-11 21:19:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:39,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596385630] [2020-11-11 21:19:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596385630] [2020-11-11 21:19:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478062368] [2020-11-11 21:19:39,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:39,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:19:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:39,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:39,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:39,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:39,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312999303] [2020-11-11 21:19:39,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:39,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:39,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:39,722 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:40,013 INFO L93 Difference]: Finished difference Result 199 states and 474 transitions. [2020-11-11 21:19:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:19:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:40,017 INFO L225 Difference]: With dead ends: 199 [2020-11-11 21:19:40,018 INFO L226 Difference]: Without dead ends: 193 [2020-11-11 21:19:40,018 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:19:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-11 21:19:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2020-11-11 21:19:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:19:40,022 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-11-11 21:19:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:40,022 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:19:40,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:19:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:19:40,023 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:40,023 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:40,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 21:19:40,224 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash 328262672, now seen corresponding path program 37 times [2020-11-11 21:19:40,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:40,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543973881] [2020-11-11 21:19:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543973881] [2020-11-11 21:19:40,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016750182] [2020-11-11 21:19:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:40,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:40,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:40,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:40,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977333304] [2020-11-11 21:19:40,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:40,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:40,592 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:41,119 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-11-11 21:19:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:19:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:41,121 INFO L225 Difference]: With dead ends: 214 [2020-11-11 21:19:41,122 INFO L226 Difference]: Without dead ends: 209 [2020-11-11 21:19:41,122 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:19:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-11 21:19:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 150. [2020-11-11 21:19:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.530201342281879) internal successors, (377), 149 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2020-11-11 21:19:41,127 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 14 [2020-11-11 21:19:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:41,127 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2020-11-11 21:19:41,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2020-11-11 21:19:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:19:41,127 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:41,127 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:41,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 21:19:41,328 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 328291502, now seen corresponding path program 38 times [2020-11-11 21:19:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:41,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496965279] [2020-11-11 21:19:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:41,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496965279] [2020-11-11 21:19:41,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413965974] [2020-11-11 21:19:41,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:41,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:19:41,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:41,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:41,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:41,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:41,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:41,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:41,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932081297] [2020-11-11 21:19:41,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:41,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:41,785 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:42,531 INFO L93 Difference]: Finished difference Result 238 states and 566 transitions. [2020-11-11 21:19:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:19:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:19:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:42,534 INFO L225 Difference]: With dead ends: 238 [2020-11-11 21:19:42,535 INFO L226 Difference]: Without dead ends: 233 [2020-11-11 21:19:42,535 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-11-11 21:19:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-11 21:19:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-11-11 21:19:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5436241610738257) internal successors, (379), 149 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 379 transitions. [2020-11-11 21:19:42,540 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 379 transitions. Word has length 14 [2020-11-11 21:19:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:42,540 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 379 transitions. [2020-11-11 21:19:42,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 379 transitions. [2020-11-11 21:19:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:19:42,541 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:42,541 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:42,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 21:19:42,755 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:42,755 INFO L82 PathProgramCache]: Analyzing trace with hash 328292463, now seen corresponding path program 39 times [2020-11-11 21:19:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:42,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865763864] [2020-11-11 21:19:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865763864] [2020-11-11 21:19:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557939454] [2020-11-11 21:19:42,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:42,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:19:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:43,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:19:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:43,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:43,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:19:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740085614] [2020-11-11 21:19:43,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:19:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:19:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:19:43,140 INFO L87 Difference]: Start difference. First operand 150 states and 379 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:19:43,712 INFO L93 Difference]: Finished difference Result 220 states and 527 transitions. [2020-11-11 21:19:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:19:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:19:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:19:43,715 INFO L225 Difference]: With dead ends: 220 [2020-11-11 21:19:43,715 INFO L226 Difference]: Without dead ends: 215 [2020-11-11 21:19:43,716 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:19:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-11 21:19:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 148. [2020-11-11 21:19:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.510204081632653) internal successors, (369), 147 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 369 transitions. [2020-11-11 21:19:43,720 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 369 transitions. Word has length 14 [2020-11-11 21:19:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:19:43,721 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 369 transitions. [2020-11-11 21:19:43,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 369 transitions. [2020-11-11 21:19:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:19:43,721 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:19:43,721 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:19:43,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:43,922 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:19:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:19:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 329185232, now seen corresponding path program 40 times [2020-11-11 21:19:43,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:19:43,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507679339] [2020-11-11 21:19:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:19:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:19:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:44,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507679339] [2020-11-11 21:19:44,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118879756] [2020-11-11 21:19:44,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:19:44,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:19:44,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:19:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:19:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:19:44,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:44,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:44,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:19:46,139 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-11 21:19:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:19:46,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:19:46,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:19:46,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116999733] [2020-11-11 21:19:46,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:19:46,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:19:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:19:46,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=211, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:19:46,145 INFO L87 Difference]: Start difference. First operand 148 states and 369 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:19:48,798 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-11 21:19:52,353 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-11 21:20:02,832 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-11 21:20:11,204 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-11-11 21:20:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:37,622 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2020-11-11 21:20:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:20:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:20:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:37,627 INFO L225 Difference]: With dead ends: 269 [2020-11-11 21:20:37,628 INFO L226 Difference]: Without dead ends: 260 [2020-11-11 21:20:37,628 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=415, Invalid=910, Unknown=7, NotChecked=0, Total=1332 [2020-11-11 21:20:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-11-11 21:20:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 151. [2020-11-11 21:20:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:20:37,632 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 14 [2020-11-11 21:20:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:37,632 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:20:37,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:20:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:20:37,633 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:37,633 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:37,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:37,834 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 329186193, now seen corresponding path program 41 times [2020-11-11 21:20:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855914718] [2020-11-11 21:20:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:37,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855914718] [2020-11-11 21:20:37,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870545127] [2020-11-11 21:20:37,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:38,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:20:38,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:20:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:20:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:20:38,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:20:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:38,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:20:38,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:20:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174139960] [2020-11-11 21:20:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:20:38,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:20:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:20:38,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:20:38,430 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:20:39,552 INFO L93 Difference]: Finished difference Result 266 states and 639 transitions. [2020-11-11 21:20:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:20:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:20:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:20:39,556 INFO L225 Difference]: With dead ends: 266 [2020-11-11 21:20:39,556 INFO L226 Difference]: Without dead ends: 258 [2020-11-11 21:20:39,556 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=372, Invalid=818, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 21:20:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-11-11 21:20:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 150. [2020-11-11 21:20:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.530201342281879) internal successors, (377), 149 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2020-11-11 21:20:39,561 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 14 [2020-11-11 21:20:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:20:39,561 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2020-11-11 21:20:39,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2020-11-11 21:20:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:20:39,562 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:20:39,562 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:20:39,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-11 21:20:39,766 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:20:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:20:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 329215023, now seen corresponding path program 42 times [2020-11-11 21:20:39,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:20:39,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988679459] [2020-11-11 21:20:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:20:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:20:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:39,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988679459] [2020-11-11 21:20:39,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314999548] [2020-11-11 21:20:39,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:20:39,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:20:39,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:20:39,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:20:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:20:40,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:20:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:20:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:20:41,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:20:41,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554075790] [2020-11-11 21:20:41,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:20:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:20:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:20:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:20:41,939 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:20:50,555 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-11 21:20:51,975 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2020-11-11 21:21:12,105 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-11-11 21:21:29,809 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-11 21:21:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:43,289 INFO L93 Difference]: Finished difference Result 269 states and 637 transitions. [2020-11-11 21:21:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:21:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:43,292 INFO L225 Difference]: With dead ends: 269 [2020-11-11 21:21:43,293 INFO L226 Difference]: Without dead ends: 264 [2020-11-11 21:21:43,293 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=380, Invalid=873, Unknown=7, NotChecked=0, Total=1260 [2020-11-11 21:21:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-11-11 21:21:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 146. [2020-11-11 21:21:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.489655172413793) internal successors, (361), 145 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 361 transitions. [2020-11-11 21:21:43,297 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 361 transitions. Word has length 14 [2020-11-11 21:21:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:43,297 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 361 transitions. [2020-11-11 21:21:43,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 361 transitions. [2020-11-11 21:21:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:43,297 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:43,297 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:43,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:43,498 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash 356890862, now seen corresponding path program 43 times [2020-11-11 21:21:43,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:43,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989220876] [2020-11-11 21:21:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:43,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989220876] [2020-11-11 21:21:43,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169970354] [2020-11-11 21:21:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:43,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:44,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:44,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162103084] [2020-11-11 21:21:44,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:44,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:44,112 INFO L87 Difference]: Start difference. First operand 146 states and 361 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:45,379 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-11-11 21:21:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:21:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:45,381 INFO L225 Difference]: With dead ends: 248 [2020-11-11 21:21:45,381 INFO L226 Difference]: Without dead ends: 243 [2020-11-11 21:21:45,382 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:21:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-11-11 21:21:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2020-11-11 21:21:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:21:45,387 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 14 [2020-11-11 21:21:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:45,387 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:21:45,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:21:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:45,388 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:45,388 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:45,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 21:21:45,593 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:45,594 INFO L82 PathProgramCache]: Analyzing trace with hash 356891823, now seen corresponding path program 44 times [2020-11-11 21:21:45,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:45,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232432854] [2020-11-11 21:21:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:45,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232432854] [2020-11-11 21:21:45,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530347426] [2020-11-11 21:21:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:45,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:46,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:46,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:46,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104994929] [2020-11-11 21:21:46,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:46,190 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:47,524 INFO L93 Difference]: Finished difference Result 256 states and 616 transitions. [2020-11-11 21:21:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:47,527 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:21:47,528 INFO L226 Difference]: Without dead ends: 251 [2020-11-11 21:21:47,528 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:21:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-11 21:21:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 150. [2020-11-11 21:21:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.530201342281879) internal successors, (377), 149 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 377 transitions. [2020-11-11 21:21:47,536 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 377 transitions. Word has length 14 [2020-11-11 21:21:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:47,536 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 377 transitions. [2020-11-11 21:21:47,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 377 transitions. [2020-11-11 21:21:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:47,537 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:47,537 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:47,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 21:21:47,745 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash 356920653, now seen corresponding path program 45 times [2020-11-11 21:21:47,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189546841] [2020-11-11 21:21:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189546841] [2020-11-11 21:21:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804589972] [2020-11-11 21:21:47,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:21:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:48,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:48,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:48,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:48,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556311841] [2020-11-11 21:21:48,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:48,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:48,457 INFO L87 Difference]: Start difference. First operand 150 states and 377 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:49,913 INFO L93 Difference]: Finished difference Result 278 states and 667 transitions. [2020-11-11 21:21:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:49,917 INFO L225 Difference]: With dead ends: 278 [2020-11-11 21:21:49,917 INFO L226 Difference]: Without dead ends: 270 [2020-11-11 21:21:49,917 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-11-11 21:21:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 149. [2020-11-11 21:21:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.554054054054054) internal successors, (378), 148 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 378 transitions. [2020-11-11 21:21:49,921 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 378 transitions. Word has length 14 [2020-11-11 21:21:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:49,921 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 378 transitions. [2020-11-11 21:21:49,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 378 transitions. [2020-11-11 21:21:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:49,922 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:49,922 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:50,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 21:21:50,123 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:50,123 INFO L82 PathProgramCache]: Analyzing trace with hash 356921614, now seen corresponding path program 46 times [2020-11-11 21:21:50,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:50,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120926084] [2020-11-11 21:21:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:50,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120926084] [2020-11-11 21:21:50,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414589725] [2020-11-11 21:21:50,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:50,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:21:50,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:50,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:50,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:50,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:50,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143628394] [2020-11-11 21:21:50,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:50,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:50,747 INFO L87 Difference]: Start difference. First operand 149 states and 378 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:52,240 INFO L93 Difference]: Finished difference Result 257 states and 622 transitions. [2020-11-11 21:21:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:52,243 INFO L225 Difference]: With dead ends: 257 [2020-11-11 21:21:52,243 INFO L226 Difference]: Without dead ends: 249 [2020-11-11 21:21:52,244 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-11-11 21:21:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2020-11-11 21:21:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5374149659863945) internal successors, (373), 147 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 373 transitions. [2020-11-11 21:21:52,248 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 373 transitions. Word has length 14 [2020-11-11 21:21:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:52,248 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 373 transitions. [2020-11-11 21:21:52,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 373 transitions. [2020-11-11 21:21:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:52,249 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:52,249 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:52,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 21:21:52,450 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash 357815344, now seen corresponding path program 47 times [2020-11-11 21:21:52,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:52,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672119773] [2020-11-11 21:21:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:52,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672119773] [2020-11-11 21:21:52,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206528649] [2020-11-11 21:21:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:52,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:21:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:52,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:53,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:53,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:53,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:53,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:53,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:53,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335156856] [2020-11-11 21:21:53,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:53,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:53,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:53,090 INFO L87 Difference]: Start difference. First operand 148 states and 373 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:54,616 INFO L93 Difference]: Finished difference Result 256 states and 617 transitions. [2020-11-11 21:21:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:21:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:54,620 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:21:54,620 INFO L226 Difference]: Without dead ends: 251 [2020-11-11 21:21:54,620 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-11 21:21:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 145. [2020-11-11 21:21:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.486111111111111) internal successors, (358), 144 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 358 transitions. [2020-11-11 21:21:54,625 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 358 transitions. Word has length 14 [2020-11-11 21:21:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:54,625 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 358 transitions. [2020-11-11 21:21:54,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 358 transitions. [2020-11-11 21:21:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:54,626 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:54,626 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:54,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 21:21:54,833 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1215765392, now seen corresponding path program 48 times [2020-11-11 21:21:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:54,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929993289] [2020-11-11 21:21:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:54,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929993289] [2020-11-11 21:21:54,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785487318] [2020-11-11 21:21:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:55,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:21:55,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:55,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:55,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:21:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:55,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:55,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673480118] [2020-11-11 21:21:55,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:55,288 INFO L87 Difference]: Start difference. First operand 145 states and 358 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:56,400 INFO L93 Difference]: Finished difference Result 239 states and 571 transitions. [2020-11-11 21:21:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:21:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:56,404 INFO L225 Difference]: With dead ends: 239 [2020-11-11 21:21:56,404 INFO L226 Difference]: Without dead ends: 234 [2020-11-11 21:21:56,405 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:21:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-11-11 21:21:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 152. [2020-11-11 21:21:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.562913907284768) internal successors, (387), 151 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 387 transitions. [2020-11-11 21:21:56,410 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 387 transitions. Word has length 14 [2020-11-11 21:21:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 387 transitions. [2020-11-11 21:21:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 387 transitions. [2020-11-11 21:21:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:56,411 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:56,411 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:56,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:56,622 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1215766353, now seen corresponding path program 49 times [2020-11-11 21:21:56,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503361703] [2020-11-11 21:21:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:56,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503361703] [2020-11-11 21:21:56,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227337644] [2020-11-11 21:21:56,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:56,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:57,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:21:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:57,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:21:57,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:21:57,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109890395] [2020-11-11 21:21:57,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:21:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:21:57,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:21:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:21:57,102 INFO L87 Difference]: Start difference. First operand 152 states and 387 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:21:58,606 INFO L93 Difference]: Finished difference Result 261 states and 631 transitions. [2020-11-11 21:21:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:21:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:21:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:21:58,608 INFO L225 Difference]: With dead ends: 261 [2020-11-11 21:21:58,608 INFO L226 Difference]: Without dead ends: 256 [2020-11-11 21:21:58,609 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:21:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-11 21:21:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 151. [2020-11-11 21:21:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.546666666666667) internal successors, (382), 150 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-11-11 21:21:58,615 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 14 [2020-11-11 21:21:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:21:58,615 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-11-11 21:21:58,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:21:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-11-11 21:21:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:21:58,616 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:21:58,616 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:21:58,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:58,829 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:21:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:21:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1215795183, now seen corresponding path program 50 times [2020-11-11 21:21:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:21:58,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593686742] [2020-11-11 21:21:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:21:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:21:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:21:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593686742] [2020-11-11 21:21:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329636382] [2020-11-11 21:21:58,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:21:59,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:21:59,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:21:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:21:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:21:59,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:22:03,208 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-11 21:22:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:22:03,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:22:03,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-11 21:22:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098817231] [2020-11-11 21:22:03,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:22:03,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:22:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:22:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2020-11-11 21:22:03,212 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:22:07,846 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-11 21:22:10,115 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-11 21:22:18,361 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-11 21:22:22,577 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-11-11 21:22:24,679 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-11-11 21:22:43,067 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-11 21:22:47,250 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-11-11 21:22:59,631 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-11 21:23:05,909 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 32 [2020-11-11 21:23:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:48,142 INFO L93 Difference]: Finished difference Result 293 states and 695 transitions. [2020-11-11 21:23:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 21:23:48,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:48,145 INFO L225 Difference]: With dead ends: 293 [2020-11-11 21:23:48,145 INFO L226 Difference]: Without dead ends: 288 [2020-11-11 21:23:48,146 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=629, Invalid=1523, Unknown=10, NotChecked=0, Total=2162 [2020-11-11 21:23:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-11-11 21:23:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 151. [2020-11-11 21:23:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.56) internal successors, (384), 150 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 384 transitions. [2020-11-11 21:23:48,150 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 384 transitions. Word has length 14 [2020-11-11 21:23:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:48,151 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 384 transitions. [2020-11-11 21:23:48,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 384 transitions. [2020-11-11 21:23:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:48,152 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:48,152 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:48,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-11 21:23:48,364 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1215796144, now seen corresponding path program 51 times [2020-11-11 21:23:48,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:48,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066155377] [2020-11-11 21:23:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066155377] [2020-11-11 21:23:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16432624] [2020-11-11 21:23:48,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:48,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:23:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:48,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:48,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:48,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:48,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871077427] [2020-11-11 21:23:48,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:48,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:48,882 INFO L87 Difference]: Start difference. First operand 151 states and 384 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:50,695 INFO L93 Difference]: Finished difference Result 285 states and 689 transitions. [2020-11-11 21:23:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:23:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:50,699 INFO L225 Difference]: With dead ends: 285 [2020-11-11 21:23:50,699 INFO L226 Difference]: Without dead ends: 277 [2020-11-11 21:23:50,700 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:23:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-11-11 21:23:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 150. [2020-11-11 21:23:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5436241610738257) internal successors, (379), 149 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 379 transitions. [2020-11-11 21:23:50,706 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 379 transitions. Word has length 14 [2020-11-11 21:23:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:50,706 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 379 transitions. [2020-11-11 21:23:50,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 379 transitions. [2020-11-11 21:23:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:50,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:50,707 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:50,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:50,919 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:50,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:50,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1216688913, now seen corresponding path program 52 times [2020-11-11 21:23:50,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:50,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185533643] [2020-11-11 21:23:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:51,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185533643] [2020-11-11 21:23:51,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742874481] [2020-11-11 21:23:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:51,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:23:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:51,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:51,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:51,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607639220] [2020-11-11 21:23:51,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:51,429 INFO L87 Difference]: Start difference. First operand 150 states and 379 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:52,986 INFO L93 Difference]: Finished difference Result 279 states and 676 transitions. [2020-11-11 21:23:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:23:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:52,989 INFO L225 Difference]: With dead ends: 279 [2020-11-11 21:23:52,989 INFO L226 Difference]: Without dead ends: 271 [2020-11-11 21:23:52,990 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:23:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-11 21:23:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 155. [2020-11-11 21:23:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.5974025974025974) internal successors, (400), 154 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 400 transitions. [2020-11-11 21:23:52,994 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 400 transitions. Word has length 14 [2020-11-11 21:23:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:52,994 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 400 transitions. [2020-11-11 21:23:52,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 400 transitions. [2020-11-11 21:23:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:52,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:52,995 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:53,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 21:23:53,197 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1216689874, now seen corresponding path program 53 times [2020-11-11 21:23:53,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:53,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70250844] [2020-11-11 21:23:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:53,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70250844] [2020-11-11 21:23:53,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199020101] [2020-11-11 21:23:53,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:53,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:23:53,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:53,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:53,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:53,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:53,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:53,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430733278] [2020-11-11 21:23:53,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:53,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:53,716 INFO L87 Difference]: Start difference. First operand 155 states and 400 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:55,132 INFO L93 Difference]: Finished difference Result 267 states and 665 transitions. [2020-11-11 21:23:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:23:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:55,135 INFO L225 Difference]: With dead ends: 267 [2020-11-11 21:23:55,135 INFO L226 Difference]: Without dead ends: 259 [2020-11-11 21:23:55,135 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:23:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-11-11 21:23:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 156. [2020-11-11 21:23:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6129032258064515) internal successors, (405), 155 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 405 transitions. [2020-11-11 21:23:55,140 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 405 transitions. Word has length 14 [2020-11-11 21:23:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:55,140 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 405 transitions. [2020-11-11 21:23:55,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 405 transitions. [2020-11-11 21:23:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:55,141 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:55,141 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:55,348 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1216718704, now seen corresponding path program 54 times [2020-11-11 21:23:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:55,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616653659] [2020-11-11 21:23:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616653659] [2020-11-11 21:23:55,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187470329] [2020-11-11 21:23:55,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:55,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:23:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:23:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:55,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:23:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:55,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:55,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:55,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993740174] [2020-11-11 21:23:55,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:55,987 INFO L87 Difference]: Start difference. First operand 156 states and 405 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:23:57,628 INFO L93 Difference]: Finished difference Result 264 states and 652 transitions. [2020-11-11 21:23:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:23:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:23:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:23:57,632 INFO L225 Difference]: With dead ends: 264 [2020-11-11 21:23:57,632 INFO L226 Difference]: Without dead ends: 256 [2020-11-11 21:23:57,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:23:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-11 21:23:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 153. [2020-11-11 21:23:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5789473684210527) internal successors, (392), 152 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 392 transitions. [2020-11-11 21:23:57,636 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 392 transitions. Word has length 14 [2020-11-11 21:23:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:23:57,636 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 392 transitions. [2020-11-11 21:23:57,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:23:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 392 transitions. [2020-11-11 21:23:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:23:57,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:23:57,637 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:23:57,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 21:23:57,838 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:23:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:23:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1244395504, now seen corresponding path program 55 times [2020-11-11 21:23:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:23:57,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187403153] [2020-11-11 21:23:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:23:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:58,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187403153] [2020-11-11 21:23:58,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117978500] [2020-11-11 21:23:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:23:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:23:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:23:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:23:58,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:23:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:23:58,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:23:58,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:23:58,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943608878] [2020-11-11 21:23:58,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:23:58,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:23:58,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:23:58,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:23:58,437 INFO L87 Difference]: Start difference. First operand 153 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:00,781 INFO L93 Difference]: Finished difference Result 256 states and 625 transitions. [2020-11-11 21:24:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:24:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:00,784 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:24:00,784 INFO L226 Difference]: Without dead ends: 251 [2020-11-11 21:24:00,784 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:24:00,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-11 21:24:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 153. [2020-11-11 21:24:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5789473684210527) internal successors, (392), 152 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 392 transitions. [2020-11-11 21:24:00,789 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 392 transitions. Word has length 14 [2020-11-11 21:24:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:00,789 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 392 transitions. [2020-11-11 21:24:00,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 392 transitions. [2020-11-11 21:24:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:00,790 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:00,790 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:00,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:00,991 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1244424334, now seen corresponding path program 56 times [2020-11-11 21:24:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:00,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717103263] [2020-11-11 21:24:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:01,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717103263] [2020-11-11 21:24:01,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995311312] [2020-11-11 21:24:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:01,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:24:01,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:01,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:01,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:01,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:01,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579430794] [2020-11-11 21:24:01,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:01,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:01,684 INFO L87 Difference]: Start difference. First operand 153 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:03,751 INFO L93 Difference]: Finished difference Result 257 states and 625 transitions. [2020-11-11 21:24:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:24:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:03,755 INFO L225 Difference]: With dead ends: 257 [2020-11-11 21:24:03,755 INFO L226 Difference]: Without dead ends: 252 [2020-11-11 21:24:03,755 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=514, Invalid=1208, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:24:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-11-11 21:24:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 149. [2020-11-11 21:24:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.554054054054054) internal successors, (378), 148 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 378 transitions. [2020-11-11 21:24:03,759 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 378 transitions. Word has length 14 [2020-11-11 21:24:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:03,760 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 378 transitions. [2020-11-11 21:24:03,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 378 transitions. [2020-11-11 21:24:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:03,760 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:03,761 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:03,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 21:24:03,968 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1245348816, now seen corresponding path program 57 times [2020-11-11 21:24:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454733257] [2020-11-11 21:24:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454733257] [2020-11-11 21:24:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024330470] [2020-11-11 21:24:04,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:24:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:04,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:04,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:04,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:04,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593032524] [2020-11-11 21:24:04,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:04,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:04,460 INFO L87 Difference]: Start difference. First operand 149 states and 378 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:05,160 INFO L93 Difference]: Finished difference Result 195 states and 462 transitions. [2020-11-11 21:24:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:24:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:05,163 INFO L225 Difference]: With dead ends: 195 [2020-11-11 21:24:05,163 INFO L226 Difference]: Without dead ends: 190 [2020-11-11 21:24:05,164 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:24:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-11 21:24:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 146. [2020-11-11 21:24:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.475862068965517) internal successors, (359), 145 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 359 transitions. [2020-11-11 21:24:05,168 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 359 transitions. Word has length 14 [2020-11-11 21:24:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:05,169 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 359 transitions. [2020-11-11 21:24:05,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 359 transitions. [2020-11-11 21:24:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:05,169 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:05,170 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:05,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-11 21:24:05,370 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2071072046, now seen corresponding path program 58 times [2020-11-11 21:24:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:05,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254954983] [2020-11-11 21:24:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:05,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254954983] [2020-11-11 21:24:05,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420314720] [2020-11-11 21:24:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:05,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:24:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:05,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:05,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:05,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369423161] [2020-11-11 21:24:05,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:05,932 INFO L87 Difference]: Start difference. First operand 146 states and 359 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:06,629 INFO L93 Difference]: Finished difference Result 220 states and 526 transitions. [2020-11-11 21:24:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:24:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:06,632 INFO L225 Difference]: With dead ends: 220 [2020-11-11 21:24:06,632 INFO L226 Difference]: Without dead ends: 215 [2020-11-11 21:24:06,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:24:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-11 21:24:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2020-11-11 21:24:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.5555555555555554) internal successors, (391), 153 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 391 transitions. [2020-11-11 21:24:06,636 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 391 transitions. Word has length 14 [2020-11-11 21:24:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:06,637 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 391 transitions. [2020-11-11 21:24:06,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 391 transitions. [2020-11-11 21:24:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:06,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:06,637 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:06,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:06,839 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2071073007, now seen corresponding path program 59 times [2020-11-11 21:24:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:06,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171695308] [2020-11-11 21:24:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171695308] [2020-11-11 21:24:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455521496] [2020-11-11 21:24:07,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:07,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 21:24:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:07,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:07,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:07,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:07,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64197284] [2020-11-11 21:24:07,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:07,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:07,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:07,341 INFO L87 Difference]: Start difference. First operand 154 states and 391 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:08,685 INFO L93 Difference]: Finished difference Result 264 states and 631 transitions. [2020-11-11 21:24:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:24:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:08,689 INFO L225 Difference]: With dead ends: 264 [2020-11-11 21:24:08,689 INFO L226 Difference]: Without dead ends: 259 [2020-11-11 21:24:08,689 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:24:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-11-11 21:24:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 153. [2020-11-11 21:24:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.539473684210526) internal successors, (386), 152 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 386 transitions. [2020-11-11 21:24:08,695 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 386 transitions. Word has length 14 [2020-11-11 21:24:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:08,695 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 386 transitions. [2020-11-11 21:24:08,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 386 transitions. [2020-11-11 21:24:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:08,696 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:08,696 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:08,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:08,907 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2071101837, now seen corresponding path program 60 times [2020-11-11 21:24:08,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230557831] [2020-11-11 21:24:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230557831] [2020-11-11 21:24:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811714568] [2020-11-11 21:24:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:09,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:24:09,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:09,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:09,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:09,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:09,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329489097] [2020-11-11 21:24:09,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:09,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:09,545 INFO L87 Difference]: Start difference. First operand 153 states and 386 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:11,157 INFO L93 Difference]: Finished difference Result 284 states and 679 transitions. [2020-11-11 21:24:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:24:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:11,159 INFO L225 Difference]: With dead ends: 284 [2020-11-11 21:24:11,160 INFO L226 Difference]: Without dead ends: 279 [2020-11-11 21:24:11,160 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:24:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-11-11 21:24:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 153. [2020-11-11 21:24:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5526315789473686) internal successors, (388), 152 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-11-11 21:24:11,165 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-11-11 21:24:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:11,165 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-11-11 21:24:11,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-11-11 21:24:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:11,166 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:11,166 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:11,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:11,379 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:11,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2071102798, now seen corresponding path program 61 times [2020-11-11 21:24:11,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96100351] [2020-11-11 21:24:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96100351] [2020-11-11 21:24:11,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475596351] [2020-11-11 21:24:11,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:11,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:11,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:11,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:11,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504143255] [2020-11-11 21:24:11,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:11,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:11,894 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:13,313 INFO L93 Difference]: Finished difference Result 270 states and 647 transitions. [2020-11-11 21:24:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:24:13,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:13,316 INFO L225 Difference]: With dead ends: 270 [2020-11-11 21:24:13,316 INFO L226 Difference]: Without dead ends: 265 [2020-11-11 21:24:13,317 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:24:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-11-11 21:24:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 151. [2020-11-11 21:24:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.52) internal successors, (378), 150 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 378 transitions. [2020-11-11 21:24:13,322 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 378 transitions. Word has length 14 [2020-11-11 21:24:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:13,322 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 378 transitions. [2020-11-11 21:24:13,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 378 transitions. [2020-11-11 21:24:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:13,322 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:13,323 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:13,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:13,523 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2071995567, now seen corresponding path program 62 times [2020-11-11 21:24:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:13,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007811152] [2020-11-11 21:24:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007811152] [2020-11-11 21:24:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589645351] [2020-11-11 21:24:13,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:13,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:24:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:14,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:14,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:14,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:14,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851713268] [2020-11-11 21:24:14,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:14,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:14,133 INFO L87 Difference]: Start difference. First operand 151 states and 378 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:16,259 INFO L93 Difference]: Finished difference Result 305 states and 728 transitions. [2020-11-11 21:24:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:24:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:16,263 INFO L225 Difference]: With dead ends: 305 [2020-11-11 21:24:16,263 INFO L226 Difference]: Without dead ends: 297 [2020-11-11 21:24:16,264 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 21:24:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-11-11 21:24:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 157. [2020-11-11 21:24:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.576923076923077) internal successors, (402), 156 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 402 transitions. [2020-11-11 21:24:16,270 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 402 transitions. Word has length 14 [2020-11-11 21:24:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:16,270 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 402 transitions. [2020-11-11 21:24:16,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 402 transitions. [2020-11-11 21:24:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:16,271 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:16,271 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:16,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 21:24:16,485 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2071996528, now seen corresponding path program 63 times [2020-11-11 21:24:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:16,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318853336] [2020-11-11 21:24:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:16,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318853336] [2020-11-11 21:24:16,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974814675] [2020-11-11 21:24:16,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:16,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:24:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:17,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:17,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:17,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:17,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426564182] [2020-11-11 21:24:17,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:17,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:17,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:17,154 INFO L87 Difference]: Start difference. First operand 157 states and 402 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:19,359 INFO L93 Difference]: Finished difference Result 308 states and 746 transitions. [2020-11-11 21:24:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:24:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:19,363 INFO L225 Difference]: With dead ends: 308 [2020-11-11 21:24:19,363 INFO L226 Difference]: Without dead ends: 300 [2020-11-11 21:24:19,363 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=514, Invalid=1208, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:24:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-11-11 21:24:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 159. [2020-11-11 21:24:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.607594936708861) internal successors, (412), 158 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 412 transitions. [2020-11-11 21:24:19,369 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 412 transitions. Word has length 14 [2020-11-11 21:24:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:19,369 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 412 transitions. [2020-11-11 21:24:19,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 412 transitions. [2020-11-11 21:24:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:19,370 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:19,370 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:19,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:19,582 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2072025358, now seen corresponding path program 64 times [2020-11-11 21:24:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761419924] [2020-11-11 21:24:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761419924] [2020-11-11 21:24:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436788631] [2020-11-11 21:24:19,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:19,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:24:19,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:20,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:20,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:20,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:20,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:20,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:20,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876578966] [2020-11-11 21:24:20,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:20,401 INFO L87 Difference]: Start difference. First operand 159 states and 412 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:22,878 INFO L93 Difference]: Finished difference Result 304 states and 730 transitions. [2020-11-11 21:24:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:24:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:22,881 INFO L225 Difference]: With dead ends: 304 [2020-11-11 21:24:22,882 INFO L226 Difference]: Without dead ends: 296 [2020-11-11 21:24:22,882 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:24:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-11 21:24:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 158. [2020-11-11 21:24:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5923566878980893) internal successors, (407), 157 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 407 transitions. [2020-11-11 21:24:22,887 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 407 transitions. Word has length 14 [2020-11-11 21:24:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:22,888 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 407 transitions. [2020-11-11 21:24:22,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 407 transitions. [2020-11-11 21:24:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:22,888 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:22,888 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:23,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 21:24:23,094 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2099701197, now seen corresponding path program 65 times [2020-11-11 21:24:23,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:23,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362287118] [2020-11-11 21:24:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362287118] [2020-11-11 21:24:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428773612] [2020-11-11 21:24:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:23,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:24:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:23,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:23,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:23,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:23,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545290320] [2020-11-11 21:24:23,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:23,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:23,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:23,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:23,587 INFO L87 Difference]: Start difference. First operand 158 states and 407 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:25,174 INFO L93 Difference]: Finished difference Result 290 states and 701 transitions. [2020-11-11 21:24:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:24:25,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:25,177 INFO L225 Difference]: With dead ends: 290 [2020-11-11 21:24:25,177 INFO L226 Difference]: Without dead ends: 282 [2020-11-11 21:24:25,178 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:24:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-11 21:24:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 161. [2020-11-11 21:24:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.6125) internal successors, (418), 160 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 418 transitions. [2020-11-11 21:24:25,184 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 418 transitions. Word has length 14 [2020-11-11 21:24:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:25,184 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 418 transitions. [2020-11-11 21:24:25,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 418 transitions. [2020-11-11 21:24:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:25,185 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:25,185 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:25,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:25,390 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:25,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2099702158, now seen corresponding path program 66 times [2020-11-11 21:24:25,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:25,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869705340] [2020-11-11 21:24:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:25,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869705340] [2020-11-11 21:24:25,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367626866] [2020-11-11 21:24:25,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:25,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:24:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:25,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:25,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:25,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:25,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503013564] [2020-11-11 21:24:25,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:25,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:25,916 INFO L87 Difference]: Start difference. First operand 161 states and 418 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:27,637 INFO L93 Difference]: Finished difference Result 299 states and 726 transitions. [2020-11-11 21:24:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:24:27,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:27,640 INFO L225 Difference]: With dead ends: 299 [2020-11-11 21:24:27,641 INFO L226 Difference]: Without dead ends: 291 [2020-11-11 21:24:27,641 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:24:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-11 21:24:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 161. [2020-11-11 21:24:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.6125) internal successors, (418), 160 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 418 transitions. [2020-11-11 21:24:27,645 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 418 transitions. Word has length 14 [2020-11-11 21:24:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:27,645 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 418 transitions. [2020-11-11 21:24:27,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 418 transitions. [2020-11-11 21:24:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:27,646 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:27,646 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:27,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 21:24:27,847 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2099730988, now seen corresponding path program 67 times [2020-11-11 21:24:27,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:27,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521405974] [2020-11-11 21:24:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:28,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521405974] [2020-11-11 21:24:28,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646830243] [2020-11-11 21:24:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:28,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:28,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:28,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:28,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909945155] [2020-11-11 21:24:28,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:28,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:28,374 INFO L87 Difference]: Start difference. First operand 161 states and 418 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:29,994 INFO L93 Difference]: Finished difference Result 310 states and 753 transitions. [2020-11-11 21:24:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:24:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:29,999 INFO L225 Difference]: With dead ends: 310 [2020-11-11 21:24:29,999 INFO L226 Difference]: Without dead ends: 302 [2020-11-11 21:24:29,999 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:24:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-11-11 21:24:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 158. [2020-11-11 21:24:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5923566878980893) internal successors, (407), 157 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 407 transitions. [2020-11-11 21:24:30,005 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 407 transitions. Word has length 14 [2020-11-11 21:24:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:30,005 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 407 transitions. [2020-11-11 21:24:30,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 407 transitions. [2020-11-11 21:24:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:30,006 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:30,006 INFO L494 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:30,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:30,219 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:30,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731949, now seen corresponding path program 68 times [2020-11-11 21:24:30,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:30,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109529410] [2020-11-11 21:24:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:30,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109529410] [2020-11-11 21:24:30,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886424308] [2020-11-11 21:24:30,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:30,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:24:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:30,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:30,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:30,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:30,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348381312] [2020-11-11 21:24:30,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:30,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:30,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:30,752 INFO L87 Difference]: Start difference. First operand 158 states and 407 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:32,395 INFO L93 Difference]: Finished difference Result 300 states and 723 transitions. [2020-11-11 21:24:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:24:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:32,400 INFO L225 Difference]: With dead ends: 300 [2020-11-11 21:24:32,400 INFO L226 Difference]: Without dead ends: 292 [2020-11-11 21:24:32,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:24:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-11 21:24:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 155. [2020-11-11 21:24:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.5454545454545454) internal successors, (392), 154 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 392 transitions. [2020-11-11 21:24:32,406 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 392 transitions. Word has length 14 [2020-11-11 21:24:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:32,406 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 392 transitions. [2020-11-11 21:24:32,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 392 transitions. [2020-11-11 21:24:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:32,407 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:32,407 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:32,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:32,620 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2100624718, now seen corresponding path program 69 times [2020-11-11 21:24:32,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:32,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489348462] [2020-11-11 21:24:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:32,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489348462] [2020-11-11 21:24:32,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630423895] [2020-11-11 21:24:32,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:32,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:24:32,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:33,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:33,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:33,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:33,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049281777] [2020-11-11 21:24:33,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:33,210 INFO L87 Difference]: Start difference. First operand 155 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:35,300 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-11-11 21:24:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:24:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:35,305 INFO L225 Difference]: With dead ends: 299 [2020-11-11 21:24:35,305 INFO L226 Difference]: Without dead ends: 291 [2020-11-11 21:24:35,306 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 21:24:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-11 21:24:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 151. [2020-11-11 21:24:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.506666666666667) internal successors, (376), 150 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 376 transitions. [2020-11-11 21:24:35,310 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 376 transitions. Word has length 14 [2020-11-11 21:24:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:35,310 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 376 transitions. [2020-11-11 21:24:35,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 376 transitions. [2020-11-11 21:24:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:35,310 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:35,311 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:35,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:35,511 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:35,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1306837936, now seen corresponding path program 70 times [2020-11-11 21:24:35,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:35,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561037317] [2020-11-11 21:24:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:35,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561037317] [2020-11-11 21:24:35,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874819611] [2020-11-11 21:24:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:35,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:24:35,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:36,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:36,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:36,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375218841] [2020-11-11 21:24:36,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:36,116 INFO L87 Difference]: Start difference. First operand 151 states and 376 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:37,326 INFO L93 Difference]: Finished difference Result 240 states and 562 transitions. [2020-11-11 21:24:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:24:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:37,329 INFO L225 Difference]: With dead ends: 240 [2020-11-11 21:24:37,329 INFO L226 Difference]: Without dead ends: 235 [2020-11-11 21:24:37,330 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-11-11 21:24:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-11 21:24:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2020-11-11 21:24:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.48993288590604) internal successors, (371), 149 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 371 transitions. [2020-11-11 21:24:37,335 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 371 transitions. Word has length 14 [2020-11-11 21:24:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:37,335 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 371 transitions. [2020-11-11 21:24:37,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 371 transitions. [2020-11-11 21:24:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:37,336 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:37,336 INFO L494 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:37,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:37,548 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:37,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1306809106, now seen corresponding path program 71 times [2020-11-11 21:24:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:37,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400059379] [2020-11-11 21:24:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:37,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400059379] [2020-11-11 21:24:37,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635237942] [2020-11-11 21:24:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:37,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:24:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:24:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:38,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:38,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:38,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-11 21:24:38,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654145188] [2020-11-11 21:24:38,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:24:38,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:24:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:24:38,154 INFO L87 Difference]: Start difference. First operand 150 states and 371 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:39,051 INFO L93 Difference]: Finished difference Result 215 states and 502 transitions. [2020-11-11 21:24:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 21:24:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:39,055 INFO L225 Difference]: With dead ends: 215 [2020-11-11 21:24:39,055 INFO L226 Difference]: Without dead ends: 210 [2020-11-11 21:24:39,056 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:24:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-11-11 21:24:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 146. [2020-11-11 21:24:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.3586206896551722) internal successors, (342), 145 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-11-11 21:24:39,059 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-11-11 21:24:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:39,059 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-11-11 21:24:39,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-11-11 21:24:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:39,060 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:39,060 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:39,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:39,265 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1198808259, now seen corresponding path program 7 times [2020-11-11 21:24:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648763413] [2020-11-11 21:24:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648763413] [2020-11-11 21:24:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339769981] [2020-11-11 21:24:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:39,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:39,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:39,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-11-11 21:24:39,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527492268] [2020-11-11 21:24:39,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 21:24:39,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 21:24:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:24:39,989 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:40,437 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-11-11 21:24:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:24:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:40,440 INFO L225 Difference]: With dead ends: 206 [2020-11-11 21:24:40,440 INFO L226 Difference]: Without dead ends: 201 [2020-11-11 21:24:40,440 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-11-11 21:24:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-11 21:24:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-11-11 21:24:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.470967741935484) internal successors, (383), 155 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-11-11 21:24:40,444 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-11-11 21:24:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:40,444 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-11-11 21:24:40,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-11-11 21:24:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:24:40,445 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:40,445 INFO L494 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:40,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:40,649 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 305862391, now seen corresponding path program 7 times [2020-11-11 21:24:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736146897] [2020-11-11 21:24:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:40,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736146897] [2020-11-11 21:24:40,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662606779] [2020-11-11 21:24:40,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:41,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:41,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:41,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:24:41,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439826820] [2020-11-11 21:24:41,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:24:41,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:24:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:24:41,328 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:41,880 INFO L93 Difference]: Finished difference Result 225 states and 536 transitions. [2020-11-11 21:24:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:24:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:24:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:41,883 INFO L225 Difference]: With dead ends: 225 [2020-11-11 21:24:41,883 INFO L226 Difference]: Without dead ends: 219 [2020-11-11 21:24:41,884 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:24:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-11 21:24:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 170. [2020-11-11 21:24:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5562130177514795) internal successors, (432), 169 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-11-11 21:24:41,888 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-11-11 21:24:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:41,888 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-11-11 21:24:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-11-11 21:24:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:24:41,889 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:41,889 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:42,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:42,090 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1586205774, now seen corresponding path program 72 times [2020-11-11 21:24:42,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:42,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613973139] [2020-11-11 21:24:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:42,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613973139] [2020-11-11 21:24:42,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307640780] [2020-11-11 21:24:42,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:42,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:24:42,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:42,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:42,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:42,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:42,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:24:42,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340339057] [2020-11-11 21:24:42,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:24:42,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:24:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:24:42,769 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:43,893 INFO L93 Difference]: Finished difference Result 245 states and 585 transitions. [2020-11-11 21:24:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:24:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:24:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:43,898 INFO L225 Difference]: With dead ends: 245 [2020-11-11 21:24:43,898 INFO L226 Difference]: Without dead ends: 240 [2020-11-11 21:24:43,899 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:24:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-11 21:24:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 169. [2020-11-11 21:24:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5416666666666665) internal successors, (427), 168 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 427 transitions. [2020-11-11 21:24:43,904 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 427 transitions. Word has length 15 [2020-11-11 21:24:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:43,904 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 427 transitions. [2020-11-11 21:24:43,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 427 transitions. [2020-11-11 21:24:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:24:43,905 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:43,905 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:44,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-11-11 21:24:44,119 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1586234604, now seen corresponding path program 73 times [2020-11-11 21:24:44,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:44,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708830242] [2020-11-11 21:24:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708830242] [2020-11-11 21:24:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615942282] [2020-11-11 21:24:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:44,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:44,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:44,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:44,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:24:44,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112987436] [2020-11-11 21:24:44,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:24:44,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:24:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:24:44,966 INFO L87 Difference]: Start difference. First operand 169 states and 427 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:46,357 INFO L93 Difference]: Finished difference Result 274 states and 652 transitions. [2020-11-11 21:24:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:24:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:24:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:46,361 INFO L225 Difference]: With dead ends: 274 [2020-11-11 21:24:46,361 INFO L226 Difference]: Without dead ends: 269 [2020-11-11 21:24:46,362 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:24:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-11-11 21:24:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-11-11 21:24:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5535714285714284) internal successors, (429), 168 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-11-11 21:24:46,367 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 15 [2020-11-11 21:24:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:46,367 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-11-11 21:24:46,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-11-11 21:24:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:24:46,368 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:46,368 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:46,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:46,583 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1586235565, now seen corresponding path program 74 times [2020-11-11 21:24:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:46,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187320794] [2020-11-11 21:24:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187320794] [2020-11-11 21:24:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482490562] [2020-11-11 21:24:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:46,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:24:46,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:47,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:24:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:47,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:47,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:24:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719110275] [2020-11-11 21:24:47,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:24:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:24:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:24:47,450 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:24:48,617 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-11-11 21:24:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:24:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:24:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:24:48,621 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:24:48,622 INFO L226 Difference]: Without dead ends: 251 [2020-11-11 21:24:48,622 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:24:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-11 21:24:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-11-11 21:24:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.5240963855421685) internal successors, (419), 166 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-11-11 21:24:48,627 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 15 [2020-11-11 21:24:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:24:48,627 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-11-11 21:24:48,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-11-11 21:24:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:24:48,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:24:48,628 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:24:48,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 21:24:48,843 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:24:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:24:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1587128334, now seen corresponding path program 75 times [2020-11-11 21:24:48,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:24:48,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68950591] [2020-11-11 21:24:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:24:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:24:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68950591] [2020-11-11 21:24:49,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201877174] [2020-11-11 21:24:49,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:24:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:24:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:24:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:24:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:24:49,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:49,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:49,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:24:49,757 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-11-11 21:24:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:24:51,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:24:51,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-11-11 21:24:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905280554] [2020-11-11 21:24:51,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 21:24:51,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:24:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 21:24:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=262, Unknown=1, NotChecked=0, Total=380 [2020-11-11 21:24:51,948 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:24:54,894 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 42 [2020-11-11 21:24:56,734 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2020-11-11 21:25:02,183 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2020-11-11 21:25:02,488 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2020-11-11 21:25:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:25:22,817 INFO L93 Difference]: Finished difference Result 291 states and 692 transitions. [2020-11-11 21:25:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:25:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:25:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:25:22,830 INFO L225 Difference]: With dead ends: 291 [2020-11-11 21:25:22,830 INFO L226 Difference]: Without dead ends: 286 [2020-11-11 21:25:22,830 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=475, Invalid=1005, Unknown=2, NotChecked=0, Total=1482 [2020-11-11 21:25:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-11 21:25:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 170. [2020-11-11 21:25:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5562130177514795) internal successors, (432), 169 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-11-11 21:25:22,836 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 15 [2020-11-11 21:25:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:25:22,836 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-11-11 21:25:22,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-11-11 21:25:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:25:22,837 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:25:22,837 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:25:23,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:23,038 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:25:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:25:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1587129295, now seen corresponding path program 76 times [2020-11-11 21:25:23,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:25:23,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714224212] [2020-11-11 21:25:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:25:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:25:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:23,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714224212] [2020-11-11 21:25:23,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674060635] [2020-11-11 21:25:23,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:23,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:25:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:25:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:25:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:25:23,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:25:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:23,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:25:23,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:25:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806081472] [2020-11-11 21:25:23,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:25:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:25:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:25:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:25:23,874 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:25:25,581 INFO L93 Difference]: Finished difference Result 317 states and 761 transitions. [2020-11-11 21:25:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:25:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:25:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:25:25,584 INFO L225 Difference]: With dead ends: 317 [2020-11-11 21:25:25,585 INFO L226 Difference]: Without dead ends: 309 [2020-11-11 21:25:25,585 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=458, Invalid=1024, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:25:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-11-11 21:25:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 169. [2020-11-11 21:25:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5416666666666665) internal successors, (427), 168 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 427 transitions. [2020-11-11 21:25:25,589 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 427 transitions. Word has length 15 [2020-11-11 21:25:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:25:25,589 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 427 transitions. [2020-11-11 21:25:25,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 427 transitions. [2020-11-11 21:25:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:25:25,590 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:25:25,590 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:25:25,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:25,791 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:25:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:25:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1587158125, now seen corresponding path program 77 times [2020-11-11 21:25:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:25:25,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438887208] [2020-11-11 21:25:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:25:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:25:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438887208] [2020-11-11 21:25:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703467243] [2020-11-11 21:25:26,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:26,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:25:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:25:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:25:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:25:26,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:25:26,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:25:26,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:25:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:26,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:25:26,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:25:26,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730974019] [2020-11-11 21:25:26,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:25:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:25:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:25:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:25:26,928 INFO L87 Difference]: Start difference. First operand 169 states and 427 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:25:28,571 INFO L93 Difference]: Finished difference Result 286 states and 687 transitions. [2020-11-11 21:25:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 21:25:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:25:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:25:28,574 INFO L225 Difference]: With dead ends: 286 [2020-11-11 21:25:28,574 INFO L226 Difference]: Without dead ends: 281 [2020-11-11 21:25:28,574 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:25:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-11 21:25:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 165. [2020-11-11 21:25:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.5060975609756095) internal successors, (411), 164 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-11-11 21:25:28,579 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 15 [2020-11-11 21:25:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:25:28,579 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-11-11 21:25:28,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-11-11 21:25:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:25:28,579 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:25:28,579 INFO L494 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:25:28,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:28,780 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:25:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:25:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1614833964, now seen corresponding path program 78 times [2020-11-11 21:25:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:25:28,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370178455] [2020-11-11 21:25:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:25:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:25:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:29,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370178455] [2020-11-11 21:25:29,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445128653] [2020-11-11 21:25:29,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:29,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:25:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:25:29,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:25:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:25:29,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:25:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:29,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:25:29,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-11 21:25:29,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790020142] [2020-11-11 21:25:29,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:25:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:25:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:25:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:25:29,606 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:25:31,685 INFO L93 Difference]: Finished difference Result 294 states and 700 transitions. [2020-11-11 21:25:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:25:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:25:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:25:31,687 INFO L225 Difference]: With dead ends: 294 [2020-11-11 21:25:31,687 INFO L226 Difference]: Without dead ends: 289 [2020-11-11 21:25:31,687 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=508, Invalid=1052, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 21:25:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-11 21:25:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 170. [2020-11-11 21:25:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5562130177514795) internal successors, (432), 169 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-11-11 21:25:31,692 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 15 [2020-11-11 21:25:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:25:31,692 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-11-11 21:25:31,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:25:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-11-11 21:25:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:25:31,693 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:25:31,693 INFO L494 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:25:31,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:31,894 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:25:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:25:31,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1614834925, now seen corresponding path program 79 times [2020-11-11 21:25:31,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:25:31,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228917885] [2020-11-11 21:25:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:25:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:25:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:25:32,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228917885] [2020-11-11 21:25:32,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409120656] [2020-11-11 21:25:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:25:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:25:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:25:34,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:25:34,737 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2020-11-11 21:25:34,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:25:34,938 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: variable got div captured at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:426) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:319) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:223) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:190) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:174) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer.tryToEliminate(DualJunctionDer.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:740) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:703) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:620) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:336) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:199) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:408) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:199) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.doit(QuantifierPusher.java:499) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.linearterms.QuantifierPusher.convert(QuantifierPusher.java:199) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:583) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:378) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-11 21:25:34,945 INFO L168 Benchmark]: Toolchain (without parser) took 457016.25 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 276.5 MB in the beginning and 365.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 50.6 MB. Max. memory is 16.0 GB. [2020-11-11 21:25:34,946 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:25:34,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.95 ms. Allocated memory is still 302.0 MB. Free memory was 275.8 MB in the beginning and 281.1 MB in the end (delta: -5.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.0 GB. [2020-11-11 21:25:34,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.18 ms. Allocated memory is still 302.0 MB. Free memory was 281.1 MB in the beginning and 279.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:25:34,947 INFO L168 Benchmark]: Boogie Preprocessor took 29.64 ms. Allocated memory is still 302.0 MB. Free memory was 279.1 MB in the beginning and 278.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:25:34,947 INFO L168 Benchmark]: RCFGBuilder took 610.62 ms. Allocated memory is still 302.0 MB. Free memory was 278.0 MB in the beginning and 256.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:25:34,947 INFO L168 Benchmark]: TraceAbstraction took 455545.15 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 256.0 MB in the beginning and 365.4 MB in the end (delta: -109.4 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. [2020-11-11 21:25:34,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory is still 271.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 754.95 ms. Allocated memory is still 302.0 MB. Free memory was 275.8 MB in the beginning and 281.1 MB in the end (delta: -5.3 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 63.18 ms. Allocated memory is still 302.0 MB. Free memory was 281.1 MB in the beginning and 279.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.64 ms. Allocated memory is still 302.0 MB. Free memory was 279.1 MB in the beginning and 278.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 610.62 ms. Allocated memory is still 302.0 MB. Free memory was 278.0 MB in the beginning and 256.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 455545.15 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 256.0 MB in the beginning and 365.4 MB in the end (delta: -109.4 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 841 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 14 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.9s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1164 MoverChecksTotal - ExceptionOrErrorResult: AssertionError: variable got div captured de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: variable got div captured: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:426) RESULT: Ultimate could not prove your program: Toolchain returned no result. [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...