/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-7bb8cbd [2020-10-15 19:52:56,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:52:56,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:52:56,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:52:56,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:52:56,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:52:56,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:52:56,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:52:56,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:52:56,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:52:56,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:52:56,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:52:56,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:52:56,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:52:56,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:52:56,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:52:56,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:52:56,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:52:56,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:52:56,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:52:56,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:52:56,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:52:56,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:52:56,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:52:56,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:52:56,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:52:56,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:52:56,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:52:56,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:52:56,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:52:56,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:52:56,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:52:56,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:52:56,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:52:56,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:52:56,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:52:56,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:52:56,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:52:56,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:52:56,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:52:56,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:52:56,402 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 [2020-10-15 19:52:56,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:52:56,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:52:56,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:52:56,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:52:56,426 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:52:56,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:52:56,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:52:56,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:52:56,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:52:56,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:52:56,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:52:56,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:52:56,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:52:56,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:52:56,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:52:56,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:52:56,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:56,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:52:56,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:52:56,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:52:56,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:52:56,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:52:56,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:52:56,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:52:56,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:52:56,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:52:56,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:52:56,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:52:56,792 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:52:56,793 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-15 19:52:56,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c142c70b/ac4baf60fe074647ad356c9a734a9756/FLAG6e94c9072 [2020-10-15 19:52:57,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:52:57,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-15 19:52:57,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c142c70b/ac4baf60fe074647ad356c9a734a9756/FLAG6e94c9072 [2020-10-15 19:52:57,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c142c70b/ac4baf60fe074647ad356c9a734a9756 [2020-10-15 19:52:57,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:52:57,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:52:57,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:57,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:52:57,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:52:57,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:57" (1/1) ... [2020-10-15 19:52:57,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5d11e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:57, skipping insertion in model container [2020-10-15 19:52:57,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:57" (1/1) ... [2020-10-15 19:52:57,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:52:57,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:52:58,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:58,264 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:52:58,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:58,384 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:52:58,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58 WrapperNode [2020-10-15 19:52:58,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:58,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:58,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:52:58,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:52:58,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:58,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:52:58,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:52:58,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:52:58,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:52:58,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:52:58,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:52:58,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:52:58,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (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 [2020-10-15 19:52:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 19:52:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 19:52:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 19:52:58,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 19:52:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:52:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 19:52:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:52:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:52:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 19:52:58,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:52:58,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:52:58,545 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:52:58,834 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:52:58,835 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 19:52:58,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:58 BoogieIcfgContainer [2020-10-15 19:52:58,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:52:58,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:52:58,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:52:58,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:52:58,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:52:57" (1/3) ... [2020-10-15 19:52:58,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1b8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:58, skipping insertion in model container [2020-10-15 19:52:58,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (2/3) ... [2020-10-15 19:52:58,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1b8b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:58, skipping insertion in model container [2020-10-15 19:52:58,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:58" (3/3) ... [2020-10-15 19:52:58,849 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-15 19:52:58,867 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:52:58,867 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:52:58,875 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:52:58,876 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:52:58,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,911 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,913 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,914 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,914 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,914 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,915 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,917 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,918 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,919 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,919 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,919 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,920 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,922 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,922 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,922 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,923 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,923 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,923 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,924 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,927 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,928 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,928 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,928 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,928 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,929 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,967 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 19:52:58,987 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:52:58,987 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:52:58,987 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:52:58,987 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:52:58,987 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:52:58,987 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:52:58,988 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:52:58,988 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:52:58,999 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:52:59,001 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:59,004 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:59,005 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:59,047 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 19:52:59,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 19:52:59,056 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 19:52:59,058 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 19:53:00,136 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 19:53:00,251 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-15 19:53:00,251 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 19:53:00,259 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 19:53:00,270 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 19:53:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 19:53:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 19:53:00,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,281 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-15 19:53:00,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505188020] [2020-10-15 19:53:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505188020] [2020-10-15 19:53:00,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 19:53:00,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110105277] [2020-10-15 19:53:00,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 19:53:00,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 19:53:00,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 19:53:00,523 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 19:53:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,592 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 19:53:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:53:00,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 19:53:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,606 INFO L225 Difference]: With dead ends: 83 [2020-10-15 19:53:00,606 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 19:53:00,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 19:53:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 19:53:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 19:53:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 19:53:00,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 19:53:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,648 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 19:53:00,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 19:53:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 19:53:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:53:00,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-15 19:53:00,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008609779] [2020-10-15 19:53:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008609779] [2020-10-15 19:53:00,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424480223] [2020-10-15 19:53:00,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:00,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:00,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,748 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 19:53:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,801 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 19:53:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:00,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,803 INFO L225 Difference]: With dead ends: 80 [2020-10-15 19:53:00,804 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 19:53:00,804 INFO L677 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 [2020-10-15 19:53:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 19:53:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 19:53:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 19:53:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 19:53:00,814 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 19:53:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,816 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 19:53:00,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 19:53:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 19:53:00,818 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-15 19:53:00,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498521442] [2020-10-15 19:53:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498521442] [2020-10-15 19:53:00,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103414172] [2020-10-15 19:53:00,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,920 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 19:53:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,947 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 19:53:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:53:00,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,949 INFO L225 Difference]: With dead ends: 73 [2020-10-15 19:53:00,949 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 19:53:00,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 19:53:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 19:53:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 19:53:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 19:53:00,960 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 19:53:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,960 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 19:53:00,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 19:53:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 19:53:00,962 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-15 19:53:00,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962950581] [2020-10-15 19:53:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962950581] [2020-10-15 19:53:01,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:01,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892853898] [2020-10-15 19:53:01,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:01,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:01,068 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 19:53:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,144 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 19:53:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:01,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,146 INFO L225 Difference]: With dead ends: 86 [2020-10-15 19:53:01,147 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 19:53:01,147 INFO L677 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 [2020-10-15 19:53:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 19:53:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 19:53:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 19:53:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 19:53:01,156 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 19:53:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,157 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 19:53:01,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 19:53:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,158 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 19:53:01,159 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-15 19:53:01,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090176446] [2020-10-15 19:53:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090176446] [2020-10-15 19:53:01,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937377086] [2020-10-15 19:53:01,294 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 [2020-10-15 19:53:01,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 19:53:01,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499024463] [2020-10-15 19:53:01,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 19:53:01,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 19:53:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:53:01,489 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 19:53:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,557 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 19:53:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:01,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 19:53:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,559 INFO L225 Difference]: With dead ends: 101 [2020-10-15 19:53:01,559 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 19:53:01,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 19:53:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 19:53:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 19:53:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 19:53:01,567 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 19:53:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,568 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 19:53:01,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 19:53:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 19:53:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:01,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,569 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-15 19:53:01,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957823708] [2020-10-15 19:53:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957823708] [2020-10-15 19:53:01,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898521824] [2020-10-15 19:53:01,887 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 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 [2020-10-15 19:53:01,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:01,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370051781] [2020-10-15 19:53:01,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:01,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:01,995 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 19:53:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,026 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 19:53:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:53:02,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,027 INFO L225 Difference]: With dead ends: 84 [2020-10-15 19:53:02,027 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 19:53:02,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 19:53:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 19:53:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 19:53:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 19:53:02,035 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 19:53:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,035 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 19:53:02,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 19:53:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:02,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,037 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,251 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-15 19:53:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556267343] [2020-10-15 19:53:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556267343] [2020-10-15 19:53:02,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158095399] [2020-10-15 19:53:02,321 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 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 [2020-10-15 19:53:02,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:02,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:02,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196293802] [2020-10-15 19:53:02,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:02,442 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 19:53:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,493 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 19:53:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:02,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,494 INFO L225 Difference]: With dead ends: 90 [2020-10-15 19:53:02,495 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 19:53:02,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:53:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 19:53:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 19:53:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 19:53:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 19:53:02,501 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 19:53:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,501 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 19:53:02,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 19:53:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:02,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,503 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,716 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-15 19:53:02,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661627852] [2020-10-15 19:53:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661627852] [2020-10-15 19:53:02,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726357017] [2020-10-15 19:53:02,767 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 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 [2020-10-15 19:53:02,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129100472] [2020-10-15 19:53:02,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:02,913 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 19:53:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,002 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 19:53:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:03,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,004 INFO L225 Difference]: With dead ends: 99 [2020-10-15 19:53:03,004 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 19:53:03,004 INFO L677 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 [2020-10-15 19:53:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 19:53:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 19:53:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 19:53:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 19:53:03,013 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 19:53:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,013 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 19:53:03,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 19:53:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,229 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,230 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-15 19:53:03,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572638005] [2020-10-15 19:53:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572638005] [2020-10-15 19:53:03,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785580055] [2020-10-15 19:53:03,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,295 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 19:53:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,331 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 19:53:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:53:03,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,333 INFO L225 Difference]: With dead ends: 92 [2020-10-15 19:53:03,333 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 19:53:03,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 19:53:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 19:53:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 19:53:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 19:53:03,340 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 19:53:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,341 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 19:53:03,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 19:53:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 19:53:03,343 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,343 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-15 19:53:03,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870813898] [2020-10-15 19:53:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870813898] [2020-10-15 19:53:03,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464084132] [2020-10-15 19:53:03,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,447 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 19:53:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,488 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 19:53:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:03,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,490 INFO L225 Difference]: With dead ends: 100 [2020-10-15 19:53:03,490 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 19:53:03,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:53:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 19:53:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 19:53:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 19:53:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 19:53:03,495 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 19:53:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,496 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 19:53:03,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 19:53:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 19:53:03,498 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-15 19:53:03,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920761952] [2020-10-15 19:53:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920761952] [2020-10-15 19:53:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785126924] [2020-10-15 19:53:03,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,552 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 19:53:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,631 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:53:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:03,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,633 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:53:03,633 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:53:03,633 INFO L677 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 [2020-10-15 19:53:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:53:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:53:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:53:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 19:53:03,646 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 19:53:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,646 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 19:53:03,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 19:53:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 19:53:03,648 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-15 19:53:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560447282] [2020-10-15 19:53:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560447282] [2020-10-15 19:53:03,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138875203] [2020-10-15 19:53:03,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,728 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 19:53:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,794 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:53:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:03,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,796 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:53:03,796 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:53:03,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:53:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:53:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:53:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 19:53:03,801 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 19:53:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,801 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 19:53:03,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 19:53:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,802 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 19:53:03,802 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,803 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-15 19:53:03,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440083279] [2020-10-15 19:53:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440083279] [2020-10-15 19:53:03,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884084303] [2020-10-15 19:53:03,866 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 [2020-10-15 19:53:03,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 19:53:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572210060] [2020-10-15 19:53:04,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:53:04,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:53:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:04,001 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 19:53:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,099 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 19:53:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:04,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 19:53:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,103 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:04,103 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:04,104 INFO L677 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 [2020-10-15 19:53:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 19:53:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 19:53:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 19:53:04,108 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 19:53:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,108 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 19:53:04,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:53:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 19:53:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,109 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:53:04,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-15 19:53:04,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056811202] [2020-10-15 19:53:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056811202] [2020-10-15 19:53:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308261592] [2020-10-15 19:53:04,395 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 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 [2020-10-15 19:53:04,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:04,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452922492] [2020-10-15 19:53:04,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,533 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 19:53:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,565 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 19:53:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:04,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,569 INFO L225 Difference]: With dead ends: 108 [2020-10-15 19:53:04,569 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 19:53:04,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 19:53:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 19:53:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 19:53:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 19:53:04,577 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 19:53:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,578 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 19:53:04,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 19:53:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:04,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,578 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,780 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-15 19:53:04,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943601770] [2020-10-15 19:53:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943601770] [2020-10-15 19:53:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496010356] [2020-10-15 19:53:04,849 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 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 [2020-10-15 19:53:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467474820] [2020-10-15 19:53:04,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,972 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 19:53:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,023 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 19:53:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:05,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,028 INFO L225 Difference]: With dead ends: 116 [2020-10-15 19:53:05,028 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 19:53:05,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 19:53:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 19:53:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 19:53:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 19:53:05,037 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 19:53:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,037 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 19:53:05,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 19:53:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,038 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 19:53:05,251 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-15 19:53:05,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674251463] [2020-10-15 19:53:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674251463] [2020-10-15 19:53:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321753386] [2020-10-15 19:53:05,331 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 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 [2020-10-15 19:53:05,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419916841] [2020-10-15 19:53:05,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,474 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 19:53:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,541 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 19:53:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:05,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,544 INFO L225 Difference]: With dead ends: 115 [2020-10-15 19:53:05,544 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 19:53:05,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 19:53:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 19:53:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:53:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 19:53:05,549 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 19:53:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,549 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 19:53:05,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 19:53:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:05,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,550 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:53:05,760 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-15 19:53:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151456795] [2020-10-15 19:53:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151456795] [2020-10-15 19:53:05,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571641639] [2020-10-15 19:53:05,813 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 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 [2020-10-15 19:53:05,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:05,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584966408] [2020-10-15 19:53:05,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,937 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 19:53:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,067 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 19:53:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:06,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,069 INFO L225 Difference]: With dead ends: 124 [2020-10-15 19:53:06,069 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 19:53:06,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 19:53:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 19:53:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:53:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 19:53:06,077 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 19:53:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 19:53:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 19:53:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,079 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:53:06,292 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-15 19:53:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556042556] [2020-10-15 19:53:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556042556] [2020-10-15 19:53:06,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79106148] [2020-10-15 19:53:06,360 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 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 [2020-10-15 19:53:06,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343269434] [2020-10-15 19:53:06,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,481 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 19:53:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,520 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 19:53:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:06,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,522 INFO L225 Difference]: With dead ends: 113 [2020-10-15 19:53:06,522 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 19:53:06,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 19:53:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 19:53:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 19:53:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 19:53:06,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 19:53:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,527 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 19:53:06,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 19:53:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:53:06,739 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-15 19:53:06,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088941499] [2020-10-15 19:53:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088941499] [2020-10-15 19:53:06,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573127364] [2020-10-15 19:53:06,809 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 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 [2020-10-15 19:53:06,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325682262] [2020-10-15 19:53:06,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,932 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 19:53:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,004 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 19:53:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,005 INFO L225 Difference]: With dead ends: 118 [2020-10-15 19:53:07,005 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 19:53:07,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 19:53:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 19:53:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 19:53:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 19:53:07,010 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 19:53:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 19:53:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 19:53:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,011 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,212 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-15 19:53:07,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421420502] [2020-10-15 19:53:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421420502] [2020-10-15 19:53:07,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563436074] [2020-10-15 19:53:07,278 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 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 [2020-10-15 19:53:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760253191] [2020-10-15 19:53:07,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:07,399 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 19:53:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,490 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 19:53:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,492 INFO L225 Difference]: With dead ends: 119 [2020-10-15 19:53:07,492 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:07,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 19:53:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 19:53:07,496 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 19:53:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,496 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 19:53:07,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 19:53:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,497 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,708 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-15 19:53:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507829587] [2020-10-15 19:53:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507829587] [2020-10-15 19:53:07,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50818508] [2020-10-15 19:53:07,777 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 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 [2020-10-15 19:53:07,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:07,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:07,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753545429] [2020-10-15 19:53:07,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:07,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:07,893 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 19:53:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,941 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 19:53:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,943 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:07,944 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 19:53:07,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 19:53:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 19:53:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 19:53:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 19:53:07,949 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 19:53:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,950 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 19:53:07,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 19:53:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,951 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:53:08,164 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-15 19:53:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120997927] [2020-10-15 19:53:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120997927] [2020-10-15 19:53:08,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485113983] [2020-10-15 19:53:08,223 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 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 [2020-10-15 19:53:08,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:08,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:08,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84289260] [2020-10-15 19:53:08,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:08,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:08,349 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,440 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 19:53:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:08,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,442 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:08,442 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:08,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 19:53:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 19:53:08,446 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 19:53:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,446 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 19:53:08,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 19:53:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,447 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,657 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-15 19:53:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409993913] [2020-10-15 19:53:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409993913] [2020-10-15 19:53:08,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856204469] [2020-10-15 19:53:08,715 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 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 [2020-10-15 19:53:08,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:08,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373936139] [2020-10-15 19:53:08,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:08,846 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 19:53:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,913 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 19:53:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:08,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,914 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:08,915 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:08,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 19:53:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 19:53:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 19:53:08,919 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 19:53:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,920 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 19:53:08,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 19:53:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,921 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 19:53:09,130 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-15 19:53:09,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921247584] [2020-10-15 19:53:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921247584] [2020-10-15 19:53:09,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215238596] [2020-10-15 19:53:09,182 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 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 [2020-10-15 19:53:09,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:09,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770632070] [2020-10-15 19:53:09,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:09,335 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 19:53:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,506 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 19:53:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:09,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,511 INFO L225 Difference]: With dead ends: 133 [2020-10-15 19:53:09,511 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:09,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 19:53:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 19:53:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 19:53:09,516 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 19:53:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,516 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 19:53:09,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 19:53:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:09,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,518 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,728 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-15 19:53:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121076114] [2020-10-15 19:53:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121076114] [2020-10-15 19:53:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342560061] [2020-10-15 19:53:09,781 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 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 [2020-10-15 19:53:09,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680253319] [2020-10-15 19:53:09,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:09,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:09,936 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,075 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 19:53:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:10,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,078 INFO L225 Difference]: With dead ends: 127 [2020-10-15 19:53:10,078 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 19:53:10,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 19:53:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 19:53:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:10,083 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,083 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:10,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:10,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,084 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 19:53:10,285 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-15 19:53:10,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791348621] [2020-10-15 19:53:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791348621] [2020-10-15 19:53:10,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306191703] [2020-10-15 19:53:10,336 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 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 [2020-10-15 19:53:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130275982] [2020-10-15 19:53:10,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:10,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:10,451 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,700 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 19:53:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:10,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,701 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:10,702 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:10,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 19:53:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:10,708 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,709 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:10,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:10,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,711 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 19:53:10,912 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-15 19:53:10,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752295380] [2020-10-15 19:53:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752295380] [2020-10-15 19:53:10,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824992482] [2020-10-15 19:53:10,974 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 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 [2020-10-15 19:53:11,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:11,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:11,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164954093] [2020-10-15 19:53:11,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:11,073 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,228 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 19:53:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:11,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,231 INFO L225 Difference]: With dead ends: 136 [2020-10-15 19:53:11,231 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 19:53:11,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 19:53:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 19:53:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 19:53:11,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 19:53:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,237 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 19:53:11,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 19:53:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,238 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 19:53:11,439 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-15 19:53:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001598984] [2020-10-15 19:53:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001598984] [2020-10-15 19:53:11,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234988437] [2020-10-15 19:53:11,494 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 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 [2020-10-15 19:53:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:11,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:11,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885675635] [2020-10-15 19:53:11,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:11,613 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 19:53:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,714 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 19:53:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,716 INFO L225 Difference]: With dead ends: 130 [2020-10-15 19:53:11,716 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:11,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 19:53:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:11,721 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,721 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:11,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:11,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,722 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 19:53:11,923 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-15 19:53:11,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812100458] [2020-10-15 19:53:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812100458] [2020-10-15 19:53:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447829257] [2020-10-15 19:53:11,972 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 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 [2020-10-15 19:53:12,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:12,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93359481] [2020-10-15 19:53:12,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:12,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:12,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:12,086 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,226 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 19:53:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:12,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,228 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:12,228 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:12,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 19:53:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:12,234 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,235 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:12,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:12,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,236 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 19:53:12,436 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-15 19:53:12,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419822080] [2020-10-15 19:53:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419822080] [2020-10-15 19:53:12,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074504468] [2020-10-15 19:53:12,492 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 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 [2020-10-15 19:53:12,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:12,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153415284] [2020-10-15 19:53:12,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:12,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:12,586 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,720 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 19:53:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:12,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,721 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:12,721 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 19:53:12,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 19:53:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 19:53:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:12,726 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,726 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:12,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:12,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,727 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,939 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-15 19:53:12,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544297741] [2020-10-15 19:53:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544297741] [2020-10-15 19:53:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404814435] [2020-10-15 19:53:12,986 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 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 [2020-10-15 19:53:13,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784088463] [2020-10-15 19:53:13,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:13,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:13,079 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,290 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 19:53:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:13,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,293 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:13,293 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:13,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 19:53:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:13,299 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,299 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:13,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:13,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,300 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 19:53:13,501 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-15 19:53:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367502478] [2020-10-15 19:53:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367502478] [2020-10-15 19:53:13,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210098597] [2020-10-15 19:53:13,549 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 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 [2020-10-15 19:53:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533713049] [2020-10-15 19:53:13,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:13,649 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,815 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 19:53:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:13,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,817 INFO L225 Difference]: With dead ends: 135 [2020-10-15 19:53:13,817 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 19:53:13,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 19:53:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 19:53:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 19:53:13,822 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 19:53:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,822 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 19:53:13,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 19:53:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:13,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,823 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:14,035 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-15 19:53:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398516086] [2020-10-15 19:53:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398516086] [2020-10-15 19:53:14,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010608705] [2020-10-15 19:53:14,104 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 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 [2020-10-15 19:53:14,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 19:53:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191426749] [2020-10-15 19:53:14,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:53:14,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:53:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:14,288 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 19:53:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,381 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 19:53:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:14,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 19:53:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,383 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:14,384 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:14,384 INFO L677 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 [2020-10-15 19:53:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 19:53:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 19:53:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 19:53:14,391 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 19:53:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,391 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 19:53:14,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:53:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 19:53:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:14,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,392 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 19:53:14,602 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-15 19:53:14,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887356478] [2020-10-15 19:53:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887356478] [2020-10-15 19:53:14,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234980514] [2020-10-15 19:53:14,684 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 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 [2020-10-15 19:53:14,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289816151] [2020-10-15 19:53:14,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,816 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 19:53:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,857 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 19:53:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:14,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,859 INFO L225 Difference]: With dead ends: 132 [2020-10-15 19:53:14,859 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:14,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 19:53:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:14,864 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,864 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:14,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:14,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,865 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 19:53:15,078 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-15 19:53:15,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542567579] [2020-10-15 19:53:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542567579] [2020-10-15 19:53:15,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143432827] [2020-10-15 19:53:15,164 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 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 [2020-10-15 19:53:15,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:15,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115135711] [2020-10-15 19:53:15,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,320 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,381 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 19:53:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:15,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,382 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:15,383 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:15,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 19:53:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:15,387 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,387 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:15,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:15,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,388 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 19:53:15,598 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-15 19:53:15,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509459823] [2020-10-15 19:53:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509459823] [2020-10-15 19:53:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601068140] [2020-10-15 19:53:15,668 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 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 [2020-10-15 19:53:15,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:15,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704002168] [2020-10-15 19:53:15,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,802 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,880 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 19:53:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:15,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,882 INFO L225 Difference]: With dead ends: 142 [2020-10-15 19:53:15,882 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 19:53:15,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 19:53:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 19:53:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 19:53:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 19:53:15,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 19:53:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,887 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 19:53:15,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 19:53:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:15,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,888 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 19:53:16,100 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-15 19:53:16,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047565813] [2020-10-15 19:53:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047565813] [2020-10-15 19:53:16,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360887763] [2020-10-15 19:53:16,178 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 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 [2020-10-15 19:53:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264385628] [2020-10-15 19:53:16,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,310 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 19:53:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,400 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 19:53:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:16,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:16,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,402 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:16,402 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:16,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 19:53:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 19:53:16,405 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 19:53:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,406 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 19:53:16,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 19:53:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,406 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 19:53:16,617 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-15 19:53:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464111046] [2020-10-15 19:53:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464111046] [2020-10-15 19:53:16,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387515512] [2020-10-15 19:53:16,678 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 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 [2020-10-15 19:53:16,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:16,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475962766] [2020-10-15 19:53:16,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,804 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,948 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:16,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,950 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:16,950 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 19:53:16,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 19:53:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 19:53:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 19:53:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 19:53:16,955 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 19:53:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,955 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 19:53:16,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 19:53:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:16,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,956 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,168 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-15 19:53:17,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904115348] [2020-10-15 19:53:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904115348] [2020-10-15 19:53:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347497878] [2020-10-15 19:53:17,237 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 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 [2020-10-15 19:53:17,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:17,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388214790] [2020-10-15 19:53:17,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,367 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,421 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 19:53:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:17,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,423 INFO L225 Difference]: With dead ends: 138 [2020-10-15 19:53:17,423 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:17,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 19:53:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 19:53:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 19:53:17,427 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 19:53:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,427 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 19:53:17,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 19:53:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 19:53:17,637 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-15 19:53:17,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105811816] [2020-10-15 19:53:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105811816] [2020-10-15 19:53:17,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755062511] [2020-10-15 19:53:17,705 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 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 [2020-10-15 19:53:17,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372258576] [2020-10-15 19:53:17,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,850 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,978 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 19:53:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:17,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,979 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:17,980 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 19:53:17,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 19:53:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 19:53:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 19:53:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 19:53:17,983 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 19:53:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,984 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 19:53:17,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 19:53:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 19:53:18,193 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-15 19:53:18,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310546577] [2020-10-15 19:53:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310546577] [2020-10-15 19:53:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101826577] [2020-10-15 19:53:18,260 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 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 [2020-10-15 19:53:18,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:18,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:18,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065475216] [2020-10-15 19:53:18,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:18,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:18,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:18,408 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 19:53:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,563 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:18,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,565 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:18,565 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:53:18,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:53:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 19:53:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 19:53:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 19:53:18,571 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 19:53:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,572 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 19:53:18,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 19:53:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,786 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-15 19:53:18,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885183457] [2020-10-15 19:53:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885183457] [2020-10-15 19:53:18,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366164475] [2020-10-15 19:53:18,894 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 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 [2020-10-15 19:53:18,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:18,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573841983] [2020-10-15 19:53:19,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,025 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,128 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 19:53:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:19,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,130 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:19,130 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:19,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 19:53:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:19,135 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,135 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:19,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,136 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 19:53:19,344 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-15 19:53:19,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735118897] [2020-10-15 19:53:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735118897] [2020-10-15 19:53:19,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913629047] [2020-10-15 19:53:19,416 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 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 [2020-10-15 19:53:19,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:19,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:19,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683092625] [2020-10-15 19:53:19,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,545 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,659 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 19:53:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:19,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,661 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:19,661 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:19,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 19:53:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 19:53:19,665 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 19:53:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,666 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 19:53:19,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 19:53:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,667 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,876 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-15 19:53:19,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48339803] [2020-10-15 19:53:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48339803] [2020-10-15 19:53:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293562011] [2020-10-15 19:53:19,963 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 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 [2020-10-15 19:53:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915892664] [2020-10-15 19:53:20,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,104 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 19:53:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,164 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 19:53:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:20,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,166 INFO L225 Difference]: With dead ends: 152 [2020-10-15 19:53:20,166 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 19:53:20,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 19:53:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 19:53:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 19:53:20,171 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 19:53:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,171 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 19:53:20,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 19:53:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 19:53:20,384 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-15 19:53:20,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332397983] [2020-10-15 19:53:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332397983] [2020-10-15 19:53:20,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678675601] [2020-10-15 19:53:20,474 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 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 [2020-10-15 19:53:20,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:20,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113084545] [2020-10-15 19:53:20,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,621 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 19:53:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,758 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 19:53:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:20,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,760 INFO L225 Difference]: With dead ends: 153 [2020-10-15 19:53:20,761 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 19:53:20,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 19:53:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 19:53:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:20,765 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,766 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:20,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 19:53:20,979 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-15 19:53:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920680277] [2020-10-15 19:53:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920680277] [2020-10-15 19:53:21,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741322465] [2020-10-15 19:53:21,061 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 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 [2020-10-15 19:53:21,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:21,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625187336] [2020-10-15 19:53:21,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,189 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,327 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:21,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,329 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:21,329 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:21,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 19:53:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 19:53:21,335 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 19:53:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,335 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 19:53:21,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 19:53:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,337 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:21,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 19:53:21,548 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-15 19:53:21,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:21,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677037733] [2020-10-15 19:53:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677037733] [2020-10-15 19:53:21,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237197044] [2020-10-15 19:53:21,619 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 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 [2020-10-15 19:53:21,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521721218] [2020-10-15 19:53:21,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,759 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,834 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 19:53:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:21,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,836 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:21,836 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:21,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 19:53:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:21,841 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,841 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:21,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 19:53:22,054 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-15 19:53:22,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173695556] [2020-10-15 19:53:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173695556] [2020-10-15 19:53:22,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686329910] [2020-10-15 19:53:22,117 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 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 [2020-10-15 19:53:22,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:22,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85960330] [2020-10-15 19:53:22,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:22,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:22,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:22,266 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,423 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 19:53:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:22,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,424 INFO L225 Difference]: With dead ends: 157 [2020-10-15 19:53:22,424 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:22,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:22,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 19:53:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 19:53:22,427 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 19:53:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,427 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 19:53:22,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 19:53:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,428 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,629 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-15 19:53:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460570927] [2020-10-15 19:53:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460570927] [2020-10-15 19:53:22,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074356383] [2020-10-15 19:53:22,693 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 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 [2020-10-15 19:53:22,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:22,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:53:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250899359] [2020-10-15 19:53:22,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:22,751 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 19:53:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,834 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 19:53:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:22,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 19:53:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,836 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:22,836 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:22,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 19:53:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:22,840 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,840 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:22,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,841 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 19:53:23,045 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-15 19:53:23,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256264364] [2020-10-15 19:53:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256264364] [2020-10-15 19:53:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191541064] [2020-10-15 19:53:23,102 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 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 [2020-10-15 19:53:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468612232] [2020-10-15 19:53:23,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,317 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,631 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 19:53:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:23,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,633 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:23,633 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:23,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 19:53:23,639 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 19:53:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,639 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 19:53:23,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 19:53:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:23,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:23,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 19:53:23,853 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-15 19:53:23,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191708543] [2020-10-15 19:53:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191708543] [2020-10-15 19:53:23,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247099190] [2020-10-15 19:53:23,916 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 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 [2020-10-15 19:53:23,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240267411] [2020-10-15 19:53:24,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,078 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:24,250 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:24,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:24,252 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:24,253 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:24,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 19:53:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:24,257 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:24,257 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:24,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,258 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,462 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-15 19:53:24,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945486153] [2020-10-15 19:53:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945486153] [2020-10-15 19:53:24,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847057073] [2020-10-15 19:53:24,517 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 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 [2020-10-15 19:53:24,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469036742] [2020-10-15 19:53:24,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,678 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,021 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 19:53:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:25,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,023 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:25,023 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 19:53:25,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:53:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 19:53:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 19:53:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:25,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:25,028 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,028 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:25,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 19:53:25,240 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-15 19:53:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716450308] [2020-10-15 19:53:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716450308] [2020-10-15 19:53:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837453782] [2020-10-15 19:53:25,290 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 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 [2020-10-15 19:53:25,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:25,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:25,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:25,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196679323] [2020-10-15 19:53:25,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:25,440 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,695 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 19:53:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:25,696 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,697 INFO L225 Difference]: With dead ends: 166 [2020-10-15 19:53:25,697 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:25,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 19:53:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 19:53:25,702 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 19:53:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,702 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 19:53:25,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 19:53:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,915 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-15 19:53:25,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955957942] [2020-10-15 19:53:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955957942] [2020-10-15 19:53:25,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619032679] [2020-10-15 19:53:25,978 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 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 [2020-10-15 19:53:26,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:26,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051737994] [2020-10-15 19:53:26,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,114 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,296 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 19:53:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:26,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,298 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:26,298 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 19:53:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 19:53:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 19:53:26,302 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 19:53:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,302 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 19:53:26,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 19:53:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:26,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 19:53:26,512 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-15 19:53:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:26,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500613499] [2020-10-15 19:53:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500613499] [2020-10-15 19:53:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491971622] [2020-10-15 19:53:26,572 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 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 [2020-10-15 19:53:26,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223527852] [2020-10-15 19:53:26,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,690 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,962 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 19:53:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:26,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,964 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:26,964 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 19:53:26,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 19:53:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 19:53:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 19:53:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 19:53:26,968 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 19:53:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,968 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 19:53:26,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 19:53:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,969 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,179 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-15 19:53:27,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931074763] [2020-10-15 19:53:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931074763] [2020-10-15 19:53:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18980700] [2020-10-15 19:53:27,233 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 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 [2020-10-15 19:53:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102819257] [2020-10-15 19:53:27,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,350 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 19:53:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:27,626 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 19:53:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:27,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:27,628 INFO L225 Difference]: With dead ends: 177 [2020-10-15 19:53:27,628 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:27,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 19:53:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 19:53:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 19:53:27,632 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 19:53:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:27,632 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 19:53:27,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 19:53:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:27,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:27,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 19:53:27,844 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-15 19:53:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931639801] [2020-10-15 19:53:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931639801] [2020-10-15 19:53:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906423254] [2020-10-15 19:53:27,896 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 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 [2020-10-15 19:53:27,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:28,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712307977] [2020-10-15 19:53:28,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:28,021 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 19:53:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:28,374 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 19:53:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:28,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:28,376 INFO L225 Difference]: With dead ends: 190 [2020-10-15 19:53:28,376 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 19:53:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 19:53:28,380 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 19:53:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:28,380 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 19:53:28,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 19:53:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:28,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:28,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 19:53:28,591 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-15 19:53:28,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119885085] [2020-10-15 19:53:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119885085] [2020-10-15 19:53:28,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960337573] [2020-10-15 19:53:28,648 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 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 [2020-10-15 19:53:28,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:28,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:28,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:28,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936909123] [2020-10-15 19:53:28,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:28,778 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 19:53:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,109 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 19:53:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:29,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,111 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:29,111 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:29,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 19:53:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 19:53:29,114 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 19:53:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,114 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 19:53:29,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 19:53:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 19:53:29,316 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-15 19:53:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498627033] [2020-10-15 19:53:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498627033] [2020-10-15 19:53:29,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216478062] [2020-10-15 19:53:29,380 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 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 [2020-10-15 19:53:29,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946616849] [2020-10-15 19:53:29,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:29,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:29,516 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 19:53:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,667 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 19:53:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:29,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,669 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:29,670 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 19:53:29,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 19:53:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 19:53:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 19:53:29,674 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 19:53:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,674 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 19:53:29,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 19:53:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,675 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 19:53:29,884 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-15 19:53:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135982480] [2020-10-15 19:53:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135982480] [2020-10-15 19:53:29,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127538949] [2020-10-15 19:53:29,940 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 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 [2020-10-15 19:53:29,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496095134] [2020-10-15 19:53:30,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:30,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:30,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:30,076 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,225 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 19:53:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:30,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,227 INFO L225 Difference]: With dead ends: 161 [2020-10-15 19:53:30,227 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:30,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 19:53:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 19:53:30,230 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 19:53:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,230 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 19:53:30,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 19:53:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:30,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 19:53:30,432 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:30,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-15 19:53:30,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:30,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796754865] [2020-10-15 19:53:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796754865] [2020-10-15 19:53:30,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458622729] [2020-10-15 19:53:30,483 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 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 [2020-10-15 19:53:30,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533412579] [2020-10-15 19:53:30,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:30,644 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,829 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 19:53:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:30,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,831 INFO L225 Difference]: With dead ends: 165 [2020-10-15 19:53:30,831 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 19:53:30,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 19:53:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 19:53:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 19:53:30,834 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 19:53:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,835 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 19:53:30,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 19:53:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,835 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 19:53:31,040 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-15 19:53:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-15 19:53:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-15 19:53:31,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644409468] [2020-10-15 19:53:31,092 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 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 [2020-10-15 19:53:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:31,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756085143] [2020-10-15 19:53:31,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:31,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:31,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:31,257 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 19:53:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:31,490 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 19:53:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:31,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:31,492 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:31,492 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:31,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 19:53:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:31,496 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:31,496 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:31,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:31,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:31,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,707 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-15 19:53:31,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494679090] [2020-10-15 19:53:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494679090] [2020-10-15 19:53:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125476283] [2020-10-15 19:53:31,770 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 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 [2020-10-15 19:53:31,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900617690] [2020-10-15 19:53:31,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:31,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:31,899 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,165 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 19:53:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:32,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,167 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:32,167 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:32,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 19:53:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:32,170 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,170 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:32,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:32,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,171 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,372 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-15 19:53:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498768619] [2020-10-15 19:53:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498768619] [2020-10-15 19:53:32,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693446727] [2020-10-15 19:53:32,428 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 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 [2020-10-15 19:53:32,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:32,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041583522] [2020-10-15 19:53:32,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:32,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:32,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:32,553 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,763 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 19:53:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:32,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,765 INFO L225 Difference]: With dead ends: 160 [2020-10-15 19:53:32,765 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:32,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 19:53:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:32,769 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,769 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:32,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,988 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-15 19:53:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765388009] [2020-10-15 19:53:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765388009] [2020-10-15 19:53:33,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512650964] [2020-10-15 19:53:33,045 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 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 [2020-10-15 19:53:33,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:33,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:33,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:33,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468418146] [2020-10-15 19:53:33,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:33,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:33,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:33,197 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,539 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 19:53:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:33,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,541 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:33,541 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 19:53:33,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 19:53:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 19:53:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:33,545 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,545 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:33,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,546 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:33,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,758 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-15 19:53:33,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:33,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624036870] [2020-10-15 19:53:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624036870] [2020-10-15 19:53:33,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862993097] [2020-10-15 19:53:33,810 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 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 [2020-10-15 19:53:33,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:33,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833249846] [2020-10-15 19:53:33,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:33,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:33,929 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,176 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 19:53:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:34,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,179 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:34,179 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:34,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 19:53:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:34,182 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,182 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:34,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:34,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:34,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 19:53:34,386 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-15 19:53:34,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:34,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967295154] [2020-10-15 19:53:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967295154] [2020-10-15 19:53:34,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107108071] [2020-10-15 19:53:34,441 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 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 [2020-10-15 19:53:34,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:34,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:34,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847501295] [2020-10-15 19:53:34,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:34,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:34,554 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,886 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 19:53:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:34,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,888 INFO L225 Difference]: With dead ends: 192 [2020-10-15 19:53:34,888 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 19:53:34,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 19:53:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 19:53:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 19:53:34,892 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 19:53:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,892 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 19:53:34,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 19:53:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:34,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,893 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:35,098 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-15 19:53:35,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484036541] [2020-10-15 19:53:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484036541] [2020-10-15 19:53:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333955825] [2020-10-15 19:53:35,151 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 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 [2020-10-15 19:53:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:35,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374134743] [2020-10-15 19:53:35,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:35,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:35,271 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:35,584 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 19:53:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:35,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:35,586 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:35,586 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:35,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 19:53:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 19:53:35,590 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 19:53:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:35,590 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 19:53:35,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 19:53:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:35,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:35,591 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 19:53:35,794 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-15 19:53:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940269268] [2020-10-15 19:53:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940269268] [2020-10-15 19:53:35,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845189103] [2020-10-15 19:53:35,869 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 [2020-10-15 19:53:35,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:53:36,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136767455] [2020-10-15 19:53:36,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:53:36,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:53:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:36,046 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 19:53:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,189 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 19:53:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:36,190 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 19:53:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,191 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:36,191 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:36,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 19:53:36,195 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 19:53:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,195 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 19:53:36,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:53:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 19:53:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,196 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,397 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-15 19:53:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183019006] [2020-10-15 19:53:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183019006] [2020-10-15 19:53:36,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817910266] [2020-10-15 19:53:36,511 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 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 [2020-10-15 19:53:36,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:36,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:36,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564115411] [2020-10-15 19:53:36,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:36,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,676 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 19:53:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,728 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:36,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,730 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:36,730 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 19:53:36,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 19:53:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 19:53:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:36,733 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,733 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:36,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:36,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,734 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 19:53:36,935 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-15 19:53:36,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400644006] [2020-10-15 19:53:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400644006] [2020-10-15 19:53:37,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721732849] [2020-10-15 19:53:37,043 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 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 [2020-10-15 19:53:37,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377474505] [2020-10-15 19:53:37,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,197 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,263 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 19:53:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:37,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,265 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:37,265 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:37,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 19:53:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:37,268 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,270 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:37,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:37,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,271 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,473 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-15 19:53:37,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597366520] [2020-10-15 19:53:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597366520] [2020-10-15 19:53:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334491106] [2020-10-15 19:53:37,562 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 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 [2020-10-15 19:53:37,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:37,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776728070] [2020-10-15 19:53:37,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,766 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,839 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 19:53:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:37,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,841 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:37,841 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:37,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 19:53:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:53:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 19:53:37,844 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 19:53:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,845 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 19:53:37,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 19:53:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:37,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,845 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,055 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-15 19:53:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686150103] [2020-10-15 19:53:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686150103] [2020-10-15 19:53:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580611625] [2020-10-15 19:53:38,140 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 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 [2020-10-15 19:53:38,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:38,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54830857] [2020-10-15 19:53:38,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,299 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 19:53:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,405 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 19:53:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:38,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,407 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:38,407 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:38,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 19:53:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 19:53:38,411 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 19:53:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,411 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 19:53:38,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 19:53:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:38,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,412 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 19:53:38,624 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-15 19:53:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366286014] [2020-10-15 19:53:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366286014] [2020-10-15 19:53:38,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376086315] [2020-10-15 19:53:38,700 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 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 [2020-10-15 19:53:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552641236] [2020-10-15 19:53:38,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,841 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 19:53:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,966 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 19:53:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:38,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,969 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:38,969 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 19:53:38,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 19:53:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 19:53:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 19:53:38,972 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 19:53:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,972 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 19:53:38,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 19:53:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:38,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,973 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:39,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,174 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-15 19:53:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477833761] [2020-10-15 19:53:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477833761] [2020-10-15 19:53:39,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361622806] [2020-10-15 19:53:39,263 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 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 [2020-10-15 19:53:39,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91265945] [2020-10-15 19:53:39,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,405 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 19:53:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:39,584 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 19:53:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:39,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:39,586 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:39,586 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:39,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 19:53:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 19:53:39,588 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 19:53:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:39,589 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 19:53:39,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 19:53:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:39,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:39,589 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:39,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,790 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-15 19:53:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220923468] [2020-10-15 19:53:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220923468] [2020-10-15 19:53:39,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186235129] [2020-10-15 19:53:39,876 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 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 [2020-10-15 19:53:39,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245633254] [2020-10-15 19:53:40,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,031 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 19:53:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,079 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 19:53:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:40,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,081 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:40,082 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:40,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 19:53:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 19:53:40,084 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 19:53:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,084 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 19:53:40,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 19:53:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,085 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 19:53:40,286 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-15 19:53:40,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262098758] [2020-10-15 19:53:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262098758] [2020-10-15 19:53:40,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938434593] [2020-10-15 19:53:40,372 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 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 [2020-10-15 19:53:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544395869] [2020-10-15 19:53:40,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,538 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,674 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 19:53:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:40,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,676 INFO L225 Difference]: With dead ends: 172 [2020-10-15 19:53:40,676 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:40,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 19:53:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:40,679 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,680 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:40,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,681 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,889 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-15 19:53:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107861370] [2020-10-15 19:53:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107861370] [2020-10-15 19:53:40,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383429731] [2020-10-15 19:53:40,973 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 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 [2020-10-15 19:53:41,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520861598] [2020-10-15 19:53:41,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,596 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:41,780 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:41,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:41,782 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:41,783 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:41,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 19:53:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 19:53:41,786 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 19:53:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:41,787 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 19:53:41,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 19:53:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:41,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:41,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:41,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 19:53:41,998 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-15 19:53:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556685782] [2020-10-15 19:53:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556685782] [2020-10-15 19:53:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452024270] [2020-10-15 19:53:42,074 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 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 [2020-10-15 19:53:42,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:42,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562929595] [2020-10-15 19:53:42,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:42,223 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 19:53:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,398 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:42,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,400 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:42,400 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:42,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 19:53:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:42,404 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,404 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:42,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,405 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 19:53:42,616 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-15 19:53:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982423914] [2020-10-15 19:53:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982423914] [2020-10-15 19:53:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5709032] [2020-10-15 19:53:42,693 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 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 [2020-10-15 19:53:42,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:42,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:42,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:42,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187759917] [2020-10-15 19:53:42,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:42,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:42,839 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,038 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 19:53:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:43,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,040 INFO L225 Difference]: With dead ends: 184 [2020-10-15 19:53:43,040 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:43,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 19:53:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 19:53:43,044 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 19:53:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,044 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 19:53:43,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 19:53:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,045 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:43,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 19:53:43,255 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-15 19:53:43,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:43,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764223223] [2020-10-15 19:53:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764223223] [2020-10-15 19:53:43,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699387806] [2020-10-15 19:53:43,333 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 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 [2020-10-15 19:53:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471156041] [2020-10-15 19:53:43,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,484 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 19:53:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,689 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 19:53:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:43,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,690 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:43,691 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:43,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 19:53:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 19:53:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 19:53:43,695 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 19:53:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,695 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 19:53:43,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 19:53:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,696 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:43,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,901 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-15 19:53:43,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:43,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63673722] [2020-10-15 19:53:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63673722] [2020-10-15 19:53:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847865436] [2020-10-15 19:53:43,987 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 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 [2020-10-15 19:53:44,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:44,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642994451] [2020-10-15 19:53:44,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:44,137 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 19:53:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,289 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 19:53:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:44,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,291 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:44,292 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 19:53:44,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 19:53:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 19:53:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 19:53:44,294 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 19:53:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,294 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 19:53:44,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 19:53:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,295 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,496 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-15 19:53:44,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449107110] [2020-10-15 19:53:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449107110] [2020-10-15 19:53:44,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077486325] [2020-10-15 19:53:44,581 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 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 [2020-10-15 19:53:44,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:44,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:44,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:44,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278061948] [2020-10-15 19:53:44,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:44,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:44,736 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,939 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:44,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,941 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:44,941 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:44,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 19:53:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 19:53:44,945 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 19:53:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,945 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 19:53:44,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 19:53:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:45,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,146 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-15 19:53:45,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:45,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644897713] [2020-10-15 19:53:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644897713] [2020-10-15 19:53:45,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740047186] [2020-10-15 19:53:45,232 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 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 [2020-10-15 19:53:45,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507265911] [2020-10-15 19:53:45,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,372 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 19:53:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,564 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:45,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,565 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:45,565 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:45,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 19:53:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 19:53:45,569 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 19:53:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,570 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 19:53:45,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 19:53:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,570 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:45,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,778 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-15 19:53:45,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:45,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603581683] [2020-10-15 19:53:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603581683] [2020-10-15 19:53:45,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802693863] [2020-10-15 19:53:45,896 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 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 [2020-10-15 19:53:45,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:45,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:45,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39079947] [2020-10-15 19:53:46,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,053 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 19:53:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:46,116 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 19:53:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:46,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:46,118 INFO L225 Difference]: With dead ends: 182 [2020-10-15 19:53:46,118 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:53:46,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:53:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 19:53:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:53:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 19:53:46,122 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 19:53:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:46,125 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 19:53:46,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 19:53:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:46,126 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 19:53:46,337 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-15 19:53:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882994947] [2020-10-15 19:53:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882994947] [2020-10-15 19:53:46,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412971317] [2020-10-15 19:53:46,443 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 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 [2020-10-15 19:53:46,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:46,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:46,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421172314] [2020-10-15 19:53:46,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,613 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 19:53:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:46,780 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 19:53:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:46,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:46,782 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:46,782 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:46,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 19:53:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:46,786 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:46,787 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:46,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:46,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:46,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,998 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-15 19:53:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108268603] [2020-10-15 19:53:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108268603] [2020-10-15 19:53:47,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168079211] [2020-10-15 19:53:47,086 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 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 [2020-10-15 19:53:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:47,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:47,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:47,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342530881] [2020-10-15 19:53:47,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:47,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:47,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:47,467 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:47,679 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 19:53:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:47,680 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:47,681 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:53:47,681 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 19:53:47,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 19:53:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 19:53:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 19:53:47,685 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 19:53:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:47,685 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 19:53:47,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 19:53:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:47,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:47,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:47,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,888 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-15 19:53:47,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790038091] [2020-10-15 19:53:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790038091] [2020-10-15 19:53:47,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359819553] [2020-10-15 19:53:47,968 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 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 [2020-10-15 19:53:48,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930703612] [2020-10-15 19:53:48,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,122 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:48,352 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 19:53:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:48,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:48,355 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:48,355 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:48,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 19:53:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:48,359 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:48,359 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:48,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:48,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:48,360 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:48,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 19:53:48,561 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-15 19:53:48,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:48,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838562005] [2020-10-15 19:53:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838562005] [2020-10-15 19:53:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311736974] [2020-10-15 19:53:48,642 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 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 [2020-10-15 19:53:48,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975156762] [2020-10-15 19:53:48,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,794 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,032 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 19:53:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:49,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,034 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:49,034 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:49,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 19:53:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 19:53:49,037 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 19:53:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,038 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 19:53:49,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 19:53:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,244 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-15 19:53:49,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038571467] [2020-10-15 19:53:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038571467] [2020-10-15 19:53:49,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050738996] [2020-10-15 19:53:49,326 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 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 [2020-10-15 19:53:49,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:49,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:49,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:49,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952209330] [2020-10-15 19:53:49,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:49,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:49,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:49,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:49,486 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 19:53:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,746 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 19:53:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:49,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,748 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:49,748 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:49,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 19:53:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 19:53:49,751 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 19:53:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 19:53:49,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 19:53:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,752 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 19:53:49,953 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-15 19:53:49,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744588250] [2020-10-15 19:53:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744588250] [2020-10-15 19:53:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380472806] [2020-10-15 19:53:50,057 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 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 [2020-10-15 19:53:50,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783351951] [2020-10-15 19:53:50,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,222 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 19:53:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,319 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 19:53:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:50,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,321 INFO L225 Difference]: With dead ends: 178 [2020-10-15 19:53:50,321 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 19:53:50,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 19:53:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 19:53:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 19:53:50,326 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 19:53:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,327 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 19:53:50,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 19:53:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,328 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:50,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:50,528 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-15 19:53:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654380587] [2020-10-15 19:53:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654380587] [2020-10-15 19:53:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519369017] [2020-10-15 19:53:50,617 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 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 [2020-10-15 19:53:50,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010478102] [2020-10-15 19:53:50,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,773 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 19:53:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,961 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 19:53:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:50,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,963 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:53:50,963 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:53:50,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:53:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 19:53:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 19:53:50,967 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 19:53:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,967 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 19:53:50,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 19:53:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,968 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 19:53:51,173 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-15 19:53:51,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774569950] [2020-10-15 19:53:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774569950] [2020-10-15 19:53:51,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405002818] [2020-10-15 19:53:51,249 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 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 [2020-10-15 19:53:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:51,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:51,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592293467] [2020-10-15 19:53:51,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:51,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:51,457 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 19:53:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:51,686 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:53:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:51,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:51,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:51,688 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:51,688 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:53:51,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:53:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 19:53:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 19:53:51,692 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 19:53:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:51,692 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 19:53:51,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 19:53:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:51,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:51,693 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:51,902 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-15 19:53:51,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440955493] [2020-10-15 19:53:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440955493] [2020-10-15 19:53:51,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185539182] [2020-10-15 19:53:51,994 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 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 [2020-10-15 19:53:52,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:52,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:52,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569498554] [2020-10-15 19:53:52,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:52,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:52,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:52,151 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 19:53:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:52,263 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 19:53:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:52,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:52,265 INFO L225 Difference]: With dead ends: 174 [2020-10-15 19:53:52,265 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:52,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 19:53:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 19:53:52,267 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 19:53:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:52,268 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 19:53:52,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 19:53:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:52,268 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:52,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 19:53:52,469 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-15 19:53:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:52,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349597940] [2020-10-15 19:53:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349597940] [2020-10-15 19:53:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113977214] [2020-10-15 19:53:52,552 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 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 [2020-10-15 19:53:52,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:52,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:52,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:52,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002558250] [2020-10-15 19:53:52,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:52,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:52,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:52,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:52,723 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 19:53:52,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:52,961 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 19:53:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:52,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:52,963 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:52,963 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:52,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 19:53:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 19:53:52,966 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 19:53:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:52,967 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 19:53:52,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 19:53:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:52,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:52,967 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:53,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,168 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-15 19:53:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295562504] [2020-10-15 19:53:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295562504] [2020-10-15 19:53:53,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207339335] [2020-10-15 19:53:53,247 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 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 [2020-10-15 19:53:53,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:53,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:53,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087048531] [2020-10-15 19:53:53,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:53,405 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:53,547 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 19:53:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:53,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:53,549 INFO L225 Difference]: With dead ends: 175 [2020-10-15 19:53:53,549 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 19:53:53,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 19:53:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 19:53:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:53,552 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:53,552 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:53,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:53,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:53,553 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:53,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,754 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-15 19:53:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:53,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126556667] [2020-10-15 19:53:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126556667] [2020-10-15 19:53:53,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187916384] [2020-10-15 19:53:53,821 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 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 [2020-10-15 19:53:53,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:53,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773874739] [2020-10-15 19:53:54,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:54,004 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:54,334 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 19:53:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:54,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:54,336 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:54,336 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:53:54,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:53:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 19:53:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:54,339 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:54,339 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:54,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:54,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:54,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:54,540 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-15 19:53:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586839233] [2020-10-15 19:53:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586839233] [2020-10-15 19:53:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445985847] [2020-10-15 19:53:54,614 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:54,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862251674] [2020-10-15 19:53:54,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:54,808 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:55,041 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 19:53:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:55,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:55,043 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:55,043 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:55,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 19:53:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:55,047 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:55,047 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:55,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:55,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:55,048 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:55,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:55,257 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-15 19:53:55,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:55,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612403316] [2020-10-15 19:53:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612403316] [2020-10-15 19:53:55,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82698974] [2020-10-15 19:53:55,325 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:55,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:55,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:55,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049515432] [2020-10-15 19:53:55,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:55,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:55,505 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:55,955 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 19:53:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:55,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:55,957 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:53:55,957 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:55,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:53:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:55,960 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:55,960 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:55,961 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:56,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 19:53:56,162 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-15 19:53:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:56,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699466756] [2020-10-15 19:53:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699466756] [2020-10-15 19:53:56,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943006646] [2020-10-15 19:53:56,241 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:56,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:56,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:56,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:56,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:56,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116139790] [2020-10-15 19:53:56,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:56,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:56,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:56,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:56,406 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:56,746 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:53:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:56,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:56,748 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:53:56,748 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:53:56,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:53:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 19:53:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 19:53:56,752 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 19:53:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:56,752 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 19:53:56,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 19:53:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:56,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:56,753 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:56,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:56,953 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-15 19:53:56,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:56,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984548877] [2020-10-15 19:53:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:57,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984548877] [2020-10-15 19:53:57,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207850066] [2020-10-15 19:53:57,026 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:57,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:57,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:57,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2392909] [2020-10-15 19:53:57,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:57,696 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 19:53:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:57,983 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 19:53:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:57,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:57,985 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:57,985 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:57,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 19:53:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:57,990 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:57,990 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:57,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:57,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:57,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:58,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 19:53:58,194 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:58,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-15 19:53:58,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:58,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338973236] [2020-10-15 19:53:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338973236] [2020-10-15 19:53:58,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734726937] [2020-10-15 19:53:58,270 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:58,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:58,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:58,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:58,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065428120] [2020-10-15 19:53:58,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:58,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:58,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:58,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:58,482 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:58,883 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 19:53:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:53:58,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:58,885 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:53:58,885 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:58,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:58,889 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:58,889 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:58,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:58,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:58,890 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:59,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 19:53:59,090 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:59,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-15 19:53:59,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:59,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628229751] [2020-10-15 19:53:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:59,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628229751] [2020-10-15 19:53:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985737507] [2020-10-15 19:53:59,165 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:59,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:59,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:59,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:59,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:59,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119687358] [2020-10-15 19:53:59,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:59,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:59,352 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:59,898 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 19:53:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:59,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:59,899 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:53:59,899 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:53:59,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:53:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:53:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 19:53:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:53:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 19:53:59,904 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 19:53:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:59,904 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 19:53:59,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 19:53:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:59,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:59,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:00,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 19:54:00,113 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-15 19:54:00,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:00,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263447221] [2020-10-15 19:54:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263447221] [2020-10-15 19:54:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433323557] [2020-10-15 19:54:00,190 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:00,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:00,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:02,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:02,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:02,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826893246] [2020-10-15 19:54:02,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:02,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 19:54:02,458 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 19:54:06,783 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:54:11,007 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:54:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:11,464 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 19:54:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:11,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:11,466 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:54:11,466 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:54:11,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 19:54:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:54:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 19:54:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:54:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 19:54:11,470 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 19:54:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:11,471 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 19:54:11,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 19:54:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:11,472 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:11,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 19:54:11,681 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-15 19:54:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:11,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385708256] [2020-10-15 19:54:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385708256] [2020-10-15 19:54:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24483084] [2020-10-15 19:54:11,756 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:11,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:11,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:13,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:54:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681665784] [2020-10-15 19:54:13,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:54:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:54:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:54:13,033 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-15 19:54:15,554 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-15 19:54:22,260 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-15 19:54:25,926 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-15 19:55:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:01,806 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-15 19:55:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:01,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:55:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:01,807 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:55:01,807 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:55:01,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-15 19:55:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:55:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-15 19:55:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 19:55:01,812 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 19:55:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:01,812 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 19:55:01,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:55:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 19:55:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:01,813 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:02,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:02,014 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-15 19:55:02,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:02,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563542494] [2020-10-15 19:55:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:02,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563542494] [2020-10-15 19:55:02,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613841346] [2020-10-15 19:55:02,090 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:02,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:02,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:02,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:02,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248484694] [2020-10-15 19:55:02,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:02,277 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:02,548 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 19:55:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:02,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:02,549 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:02,549 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:55:02,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:55:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 19:55:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 19:55:02,553 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 19:55:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:02,554 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 19:55:02,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 19:55:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:02,557 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:02,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:02,767 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-15 19:55:02,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:02,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255069506] [2020-10-15 19:55:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255069506] [2020-10-15 19:55:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249938399] [2020-10-15 19:55:02,843 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:02,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:55:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:02,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:03,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369774851] [2020-10-15 19:55:03,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:03,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:03,016 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 19:55:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:03,292 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 19:55:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:03,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:03,294 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:03,294 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:55:03,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:55:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 19:55:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 19:55:03,299 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 19:55:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:03,300 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 19:55:03,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 19:55:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:03,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:03,300 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:03,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 19:55:03,510 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:03,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-15 19:55:03,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:03,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381007380] [2020-10-15 19:55:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:03,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381007380] [2020-10-15 19:55:03,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677375294] [2020-10-15 19:55:03,591 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:03,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:03,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:03,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:03,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:03,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083255049] [2020-10-15 19:55:03,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:03,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:03,770 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 19:55:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:04,072 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 19:55:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:04,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:04,073 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:04,073 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:55:04,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:55:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 19:55:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 19:55:04,077 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 19:55:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:04,077 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 19:55:04,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 19:55:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:04,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:04,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:04,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 19:55:04,279 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-15 19:55:04,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:04,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880642591] [2020-10-15 19:55:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880642591] [2020-10-15 19:55:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722285894] [2020-10-15 19:55:04,354 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:04,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:04,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:04,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:04,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977845425] [2020-10-15 19:55:04,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:04,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:04,526 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 19:55:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:04,988 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 19:55:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:55:04,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:04,990 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:55:04,990 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:55:04,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:55:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 19:55:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 19:55:04,995 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 19:55:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:04,995 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 19:55:04,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 19:55:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:04,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:04,996 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:05,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 19:55:05,200 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-15 19:55:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:05,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556855874] [2020-10-15 19:55:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:05,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556855874] [2020-10-15 19:55:05,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706882233] [2020-10-15 19:55:05,280 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:05,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:55:05,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:05,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:05,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:05,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:05,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061835679] [2020-10-15 19:55:05,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:05,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:05,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:05,439 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 19:55:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:05,866 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 19:55:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:05,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:05,868 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:55:05,868 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:55:05,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:55:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 19:55:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:55:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:55:05,872 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:55:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:05,872 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:55:05,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:55:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:05,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:05,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:06,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:06,082 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-15 19:55:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:06,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34574641] [2020-10-15 19:55:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34574641] [2020-10-15 19:55:06,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514832648] [2020-10-15 19:55:06,164 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:06,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:06,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:06,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604792303] [2020-10-15 19:55:06,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:06,339 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:06,776 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 19:55:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:06,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:06,777 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:55:06,777 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 19:55:06,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 19:55:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 19:55:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:06,781 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:06,782 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:06,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:06,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:06,782 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:06,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:06,986 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-15 19:55:06,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:06,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814016834] [2020-10-15 19:55:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:07,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814016834] [2020-10-15 19:55:07,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510678110] [2020-10-15 19:55:07,067 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:07,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:07,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:07,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620278792] [2020-10-15 19:55:07,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:07,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:07,232 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:07,729 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 19:55:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:07,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:07,731 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:55:07,731 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:55:07,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:55:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:55:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 19:55:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:07,734 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:07,735 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:07,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:07,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:07,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:07,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 19:55:07,936 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-15 19:55:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:07,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990542886] [2020-10-15 19:55:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:08,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990542886] [2020-10-15 19:55:08,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675455396] [2020-10-15 19:55:08,016 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:08,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:55:08,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:08,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:08,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:08,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:08,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029389970] [2020-10-15 19:55:08,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:08,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:08,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:08,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:08,205 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:08,825 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 19:55:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:08,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:08,827 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:55:08,827 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:55:08,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:55:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:55:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 19:55:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:55:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:55:08,831 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:55:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:08,831 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:55:08,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:55:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:08,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:08,832 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:09,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 19:55:09,033 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-15 19:55:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:09,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769315679] [2020-10-15 19:55:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769315679] [2020-10-15 19:55:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234314768] [2020-10-15 19:55:09,112 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:09,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:09,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:09,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:09,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56332607] [2020-10-15 19:55:09,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:09,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:09,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:09,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:09,286 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:09,779 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 19:55:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:55:09,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:09,780 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:55:09,780 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:55:09,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:55:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 19:55:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:09,783 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:09,783 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:09,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:09,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:09,783 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:09,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:09,984 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-15 19:55:09,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:09,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213912296] [2020-10-15 19:55:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:10,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213912296] [2020-10-15 19:55:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828009679] [2020-10-15 19:55:10,068 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:10,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:10,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:10,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:10,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486084904] [2020-10-15 19:55:10,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:10,240 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:10,865 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 19:55:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:10,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:10,867 INFO L225 Difference]: With dead ends: 240 [2020-10-15 19:55:10,867 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:55:10,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:55:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 19:55:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 19:55:10,870 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 19:55:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:10,870 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 19:55:10,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 19:55:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:10,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:10,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:11,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 19:55:11,072 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-15 19:55:11,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:11,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-15 19:55:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165064751] [2020-10-15 19:55:11,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630245939] [2020-10-15 19:55:11,151 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:11,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:55:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:11,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:11,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:11,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:11,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118810463] [2020-10-15 19:55:11,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:11,354 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 19:55:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:12,250 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 19:55:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:12,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:12,255 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:55:12,256 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 19:55:12,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 19:55:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 19:55:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:55:12,262 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:55:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:12,262 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:55:12,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:55:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:12,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:12,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:12,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:12,477 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-15 19:55:12,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:12,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086407651] [2020-10-15 19:55:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:12,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086407651] [2020-10-15 19:55:12,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279951505] [2020-10-15 19:55:12,586 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262084668] [2020-10-15 19:55:12,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:12,839 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:55:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:13,100 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 19:55:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:13,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:13,102 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:55:13,102 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:55:13,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:55:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 19:55:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:55:13,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:55:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:13,105 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:55:13,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:55:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:13,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:13,106 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:13,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 19:55:13,314 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-15 19:55:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:13,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988151479] [2020-10-15 19:55:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:13,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988151479] [2020-10-15 19:55:13,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788439654] [2020-10-15 19:55:13,395 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:13,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:13,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:13,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:13,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:13,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683174442] [2020-10-15 19:55:13,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:13,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:13,588 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:55:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:14,092 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 19:55:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:14,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:14,093 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:55:14,093 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:55:14,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:55:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 19:55:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 19:55:14,095 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 19:55:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:14,095 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 19:55:14,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 19:55:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:14,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:14,096 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:14,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:14,297 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-15 19:55:14,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:14,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242865517] [2020-10-15 19:55:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:14,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242865517] [2020-10-15 19:55:14,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16656502] [2020-10-15 19:55:14,379 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:14,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:14,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:17,052 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-10-15 19:55:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:17,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:17,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:55:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003114526] [2020-10-15 19:55:17,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:55:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:55:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:55:17,054 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 19:55:19,515 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:55:41,972 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 19:56:17,434 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 19:56:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:35,049 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-15 19:56:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:56:35,050 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:56:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:35,051 INFO L225 Difference]: With dead ends: 260 [2020-10-15 19:56:35,052 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 19:56:35,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 19:56:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 19:56:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-15 19:56:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 19:56:35,056 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 19:56:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:35,056 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 19:56:35,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:56:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 19:56:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:35,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:35,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:35,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 19:56:35,266 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-15 19:56:35,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:35,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138428629] [2020-10-15 19:56:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:35,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138428629] [2020-10-15 19:56:35,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359983682] [2020-10-15 19:56:35,355 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:35,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:35,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:35,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141013331] [2020-10-15 19:56:35,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:35,527 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 19:56:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:35,752 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:56:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:35,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:35,754 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:35,754 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:35,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:56:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 19:56:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:56:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 19:56:35,756 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 19:56:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:35,757 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 19:56:35,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 19:56:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:35,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:35,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:35,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:35,958 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-15 19:56:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:35,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189931419] [2020-10-15 19:56:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189931419] [2020-10-15 19:56:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515102981] [2020-10-15 19:56:36,056 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:36,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:36,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:36,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:36,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:36,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180160498] [2020-10-15 19:56:36,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:36,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:36,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:36,239 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 19:56:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:36,567 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 19:56:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:36,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:36,569 INFO L225 Difference]: With dead ends: 205 [2020-10-15 19:56:36,569 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 19:56:36,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 19:56:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 19:56:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 19:56:36,573 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 19:56:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:36,573 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 19:56:36,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 19:56:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:36,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:36,574 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:36,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:36,784 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-15 19:56:36,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:36,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531171901] [2020-10-15 19:56:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531171901] [2020-10-15 19:56:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208369308] [2020-10-15 19:56:36,869 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:36,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:37,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861875219] [2020-10-15 19:56:37,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:37,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:37,030 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 19:56:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:37,309 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:56:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:37,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:37,311 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:56:37,311 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:56:37,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:56:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 19:56:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 19:56:37,314 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 19:56:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:37,314 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 19:56:37,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 19:56:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:37,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:37,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:37,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:37,516 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-15 19:56:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:37,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265867888] [2020-10-15 19:56:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265867888] [2020-10-15 19:56:37,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461564600] [2020-10-15 19:56:37,602 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:37,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:37,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:37,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770358122] [2020-10-15 19:56:37,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:37,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:37,864 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 19:56:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:38,220 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:56:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:38,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:38,222 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:38,222 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:38,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 19:56:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:56:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 19:56:38,227 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 19:56:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:38,228 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 19:56:38,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 19:56:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:38,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:38,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:38,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 19:56:38,440 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-15 19:56:38,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:38,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261597392] [2020-10-15 19:56:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261597392] [2020-10-15 19:56:38,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572834454] [2020-10-15 19:56:38,558 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:38,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:38,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:38,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613081417] [2020-10-15 19:56:38,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:38,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:38,852 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 19:56:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:39,373 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 19:56:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:39,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:39,375 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:56:39,376 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:56:39,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:56:39,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 19:56:39,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:56:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 19:56:39,381 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 19:56:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:39,381 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 19:56:39,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 19:56:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:39,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:39,382 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:39,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,593 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-15 19:56:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:39,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187088657] [2020-10-15 19:56:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187088657] [2020-10-15 19:56:39,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743619213] [2020-10-15 19:56:39,675 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:39,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:39,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169374330] [2020-10-15 19:56:39,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:39,872 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 19:56:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:40,221 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 19:56:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:40,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:40,223 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:56:40,223 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:56:40,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:56:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 19:56:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:56:40,225 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:56:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:40,226 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:56:40,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:56:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:40,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 19:56:40,427 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-15 19:56:40,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:40,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788792808] [2020-10-15 19:56:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788792808] [2020-10-15 19:56:40,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081606265] [2020-10-15 19:56:40,521 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:40,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:40,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:40,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225125111] [2020-10-15 19:56:40,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:40,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:40,699 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,019 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:56:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:41,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,020 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:56:41,020 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:56:41,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:56:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 19:56:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:56:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 19:56:41,023 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 19:56:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,023 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 19:56:41,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 19:56:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:41,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:41,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 19:56:41,224 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-15 19:56:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:41,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858702581] [2020-10-15 19:56:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858702581] [2020-10-15 19:56:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679861873] [2020-10-15 19:56:41,306 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:41,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:41,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:41,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:41,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516160702] [2020-10-15 19:56:41,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:41,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:41,491 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 19:56:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,954 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 19:56:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:56:41,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,955 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:56:41,955 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:56:41,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:56:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:56:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 19:56:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:56:41,959 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:56:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,959 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:56:41,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:56:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:41,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:42,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,163 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-15 19:56:42,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:42,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789290943] [2020-10-15 19:56:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789290943] [2020-10-15 19:56:42,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78120583] [2020-10-15 19:56:42,244 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:42,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:42,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:42,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:42,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302507236] [2020-10-15 19:56:42,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:42,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:42,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:42,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:42,438 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:56:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:42,822 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 19:56:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:42,822 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:42,823 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:56:42,823 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:56:42,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:56:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 19:56:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:42,828 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:42,828 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:42,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:42,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:42,829 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:43,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,037 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-15 19:56:43,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:43,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203802897] [2020-10-15 19:56:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203802897] [2020-10-15 19:56:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876882338] [2020-10-15 19:56:43,111 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:43,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:43,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:43,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277446464] [2020-10-15 19:56:43,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:43,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:43,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:43,273 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:43,709 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 19:56:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:43,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:43,712 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:56:43,712 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:56:43,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:56:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 19:56:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:43,716 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:43,717 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:43,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:43,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:43,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:43,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 19:56:43,927 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-15 19:56:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:43,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941400247] [2020-10-15 19:56:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941400247] [2020-10-15 19:56:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73389615] [2020-10-15 19:56:44,028 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:44,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:44,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834805442] [2020-10-15 19:56:44,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:44,237 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:44,923 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 19:56:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:56:44,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:44,924 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:56:44,925 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:44,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:56:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 19:56:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:56:44,928 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:56:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:44,928 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:56:44,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:56:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:44,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:44,929 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:45,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:45,138 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-15 19:56:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389444265] [2020-10-15 19:56:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389444265] [2020-10-15 19:56:45,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108362920] [2020-10-15 19:56:45,221 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:45,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:45,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:45,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:45,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071783265] [2020-10-15 19:56:45,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:45,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:45,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:45,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:45,422 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:56:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:46,032 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 19:56:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:56:46,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:46,033 INFO L225 Difference]: With dead ends: 222 [2020-10-15 19:56:46,033 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 19:56:46,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:56:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 19:56:46,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 19:56:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:46,036 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:46,036 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:46,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:46,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:46,037 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:46,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,238 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-15 19:56:46,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:46,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301657469] [2020-10-15 19:56:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301657469] [2020-10-15 19:56:46,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936456122] [2020-10-15 19:56:46,322 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:46,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:46,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437659587] [2020-10-15 19:56:46,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:46,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:46,544 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:47,365 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 19:56:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:47,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:47,367 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:56:47,367 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 19:56:47,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 19:56:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 19:56:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:56:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 19:56:47,372 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 19:56:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:47,372 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 19:56:47,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 19:56:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:47,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:47,373 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:47,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:47,577 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-15 19:56:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:47,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374954714] [2020-10-15 19:56:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374954714] [2020-10-15 19:56:47,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764683832] [2020-10-15 19:56:47,663 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:47,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:47,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:47,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:47,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:47,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359914368] [2020-10-15 19:56:47,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:47,854 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 19:56:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:48,682 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 19:56:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:48,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:48,685 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:56:48,685 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 19:56:48,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:56:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 19:56:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 19:56:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 19:56:48,689 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 19:56:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:48,689 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 19:56:48,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 19:56:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:48,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:48,690 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:48,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 19:56:48,901 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-15 19:56:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:48,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322376076] [2020-10-15 19:56:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322376076] [2020-10-15 19:56:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904581137] [2020-10-15 19:56:48,992 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:49,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:49,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:49,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455622046] [2020-10-15 19:56:49,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:49,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:49,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:49,191 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 19:56:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:49,640 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 19:56:49,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:56:49,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:49,641 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:56:49,641 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:56:49,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:56:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 19:56:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:56:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 19:56:49,644 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 19:56:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:49,644 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 19:56:49,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 19:56:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:49,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:49,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:49,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 19:56:49,845 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-15 19:56:49,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:49,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41898376] [2020-10-15 19:56:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41898376] [2020-10-15 19:56:49,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016689336] [2020-10-15 19:56:49,941 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:50,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:50,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352520964] [2020-10-15 19:56:50,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:50,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:50,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:50,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:50,107 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 19:56:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:50,687 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 19:56:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:56:50,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:50,688 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:56:50,688 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:56:50,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:56:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:56:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 19:56:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:56:50,692 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:56:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:50,692 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:56:50,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:56:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:50,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:50,693 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:50,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 19:56:50,893 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:50,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-15 19:56:50,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:50,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088373250] [2020-10-15 19:56:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088373250] [2020-10-15 19:56:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163135940] [2020-10-15 19:56:50,983 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:51,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:51,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:51,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910917078] [2020-10-15 19:56:51,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:51,146 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:51,763 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 19:56:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:51,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:51,764 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:56:51,765 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:56:51,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:56:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 19:56:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:56:51,768 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:56:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:51,768 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:56:51,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:56:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:51,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:51,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:51,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 19:56:51,970 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:51,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-15 19:56:51,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:51,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360502880] [2020-10-15 19:56:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360502880] [2020-10-15 19:56:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866499229] [2020-10-15 19:56:52,055 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:52,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:52,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:52,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:52,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:52,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:52,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:52,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695537928] [2020-10-15 19:56:52,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:52,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:52,225 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:52,948 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 19:56:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:52,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:52,950 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:56:52,950 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:52,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 19:56:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 19:56:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 19:56:52,953 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 19:56:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:52,954 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 19:56:52,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 19:56:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:52,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:53,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 19:56:53,155 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-15 19:56:53,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:53,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059228412] [2020-10-15 19:56:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:53,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059228412] [2020-10-15 19:56:53,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011714762] [2020-10-15 19:56:53,246 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:53,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:53,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:53,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:53,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155170778] [2020-10-15 19:56:53,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:53,416 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 19:56:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:54,044 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 19:56:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:56:54,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:54,046 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:56:54,046 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 19:56:54,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:56:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 19:56:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 19:56:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:56:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 19:56:54,050 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 19:56:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:54,050 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 19:56:54,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 19:56:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:54,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:54,051 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:54,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:54,259 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-15 19:56:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442910913] [2020-10-15 19:56:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442910913] [2020-10-15 19:56:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529270506] [2020-10-15 19:56:54,380 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:54,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:56:54,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:54,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:54,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:56:54,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969808489] [2020-10-15 19:56:54,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:56:54,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:54,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:56:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:54,666 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 19:56:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:54,970 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 19:56:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:54,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 19:56:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:54,972 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:56:54,972 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:56:54,973 INFO L677 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 [2020-10-15 19:56:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:56:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 19:56:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:56:54,976 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:56:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:54,976 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:56:54,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:56:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:56:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:54,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:54,977 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:55,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 19:56:55,178 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:55,178 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-15 19:56:55,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:55,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33388739] [2020-10-15 19:56:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:55,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33388739] [2020-10-15 19:56:55,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993228391] [2020-10-15 19:56:55,345 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:55,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:56:55,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:55,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:55,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680849524] [2020-10-15 19:56:55,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:55,584 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 19:56:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:55,650 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 19:56:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:56:55,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:55,651 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:56:55,651 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:56:55,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:56:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 19:56:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:56:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:56:55,655 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:56:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:55,655 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:56:55,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:56:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:55,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:55,656 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:55,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 19:56:55,866 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-15 19:56:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:55,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141707250] [2020-10-15 19:56:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141707250] [2020-10-15 19:56:56,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604127281] [2020-10-15 19:56:56,021 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150650698] [2020-10-15 19:56:56,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:56,256 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:56:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:56,348 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 19:56:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:56,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:56,349 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:56:56,349 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:56:56,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:56:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 19:56:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:56:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:56:56,352 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:56:56,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:56,353 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:56:56,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:56:56,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:56,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:56,353 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:56,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,554 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:56,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-15 19:56:56,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722365006] [2020-10-15 19:56:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722365006] [2020-10-15 19:56:56,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358132193] [2020-10-15 19:56:56,687 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 19:56:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:56,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275326509] [2020-10-15 19:56:56,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:56,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:56,901 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:56:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:57,009 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 19:56:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:56:57,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:57,011 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:56:57,011 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:56:57,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:56:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:56:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 19:56:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 19:56:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 19:56:57,014 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 19:56:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:57,014 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 19:56:57,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 19:56:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:57,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:57,015 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:57,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:57,218 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-15 19:56:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:57,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070962076] [2020-10-15 19:56:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070962076] [2020-10-15 19:56:57,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985595278] [2020-10-15 19:56:57,349 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:57,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:56:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:57,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:57,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746984927] [2020-10-15 19:56:57,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:57,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:57,548 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 19:56:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:57,681 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:56:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:57,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:57,683 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:56:57,683 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:57,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:56:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 19:56:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 19:56:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 19:56:57,686 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 19:56:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:57,686 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 19:56:57,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 19:56:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:57,686 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:57,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:57,887 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-15 19:56:57,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:57,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969004722] [2020-10-15 19:56:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969004722] [2020-10-15 19:56:58,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210930922] [2020-10-15 19:56:58,021 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:58,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836924223] [2020-10-15 19:56:58,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:58,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:58,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:58,248 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 19:56:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:58,440 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 19:56:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:58,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:58,441 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:58,441 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:56:58,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:56:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:56:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 19:56:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 19:56:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 19:56:58,446 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 19:56:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:58,446 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 19:56:58,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 19:56:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:58,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:58,447 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:58,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,659 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-15 19:56:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:58,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289851002] [2020-10-15 19:56:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289851002] [2020-10-15 19:56:58,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56189425] [2020-10-15 19:56:58,780 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:58,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:59,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:59,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68911296] [2020-10-15 19:56:59,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:59,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:59,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:59,030 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 19:56:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:59,254 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 19:56:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:59,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:59,255 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:56:59,256 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:56:59,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:56:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 19:56:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:56:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 19:56:59,259 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 19:56:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:59,259 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 19:56:59,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 19:56:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:59,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:59,259 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:59,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 19:56:59,460 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-15 19:56:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:59,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415112126] [2020-10-15 19:56:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415112126] [2020-10-15 19:56:59,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172280669] [2020-10-15 19:56:59,579 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:59,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:56:59,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:59,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:59,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170754897] [2020-10-15 19:56:59,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:59,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:59,842 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 19:57:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:00,112 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:57:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:00,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:57:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:00,114 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:57:00,114 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:57:00,115 INFO L677 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 [2020-10-15 19:57:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:57:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 19:57:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 19:57:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 19:57:00,120 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 19:57:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:00,120 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 19:57:00,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 19:57:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:00,121 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:00,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 19:57:00,331 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-15 19:57:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:00,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616093911] [2020-10-15 19:57:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616093911] [2020-10-15 19:57:00,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052813182] [2020-10-15 19:57:00,440 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:00,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:00,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:00,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226030407] [2020-10-15 19:57:00,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:00,664 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 19:57:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:00,728 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 19:57:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:57:00,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:00,730 INFO L225 Difference]: With dead ends: 188 [2020-10-15 19:57:00,730 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:57:00,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:57:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 19:57:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 19:57:00,734 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 19:57:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:00,734 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 19:57:00,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 19:57:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:00,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:00,734 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:00,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 19:57:00,935 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-15 19:57:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432654124] [2020-10-15 19:57:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432654124] [2020-10-15 19:57:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132784873] [2020-10-15 19:57:01,069 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:01,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:01,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:01,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:01,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225325381] [2020-10-15 19:57:01,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:01,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:01,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:01,295 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 19:57:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:01,517 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 19:57:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:01,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:01,519 INFO L225 Difference]: With dead ends: 199 [2020-10-15 19:57:01,519 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:57:01,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:57:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 19:57:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:57:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:57:01,522 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:57:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:01,522 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:57:01,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:57:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:01,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:01,523 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:01,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 19:57:01,724 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-15 19:57:01,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:01,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059539234] [2020-10-15 19:57:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059539234] [2020-10-15 19:57:01,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129462867] [2020-10-15 19:57:01,844 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:02,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:02,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189358823] [2020-10-15 19:57:02,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:02,121 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:02,580 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:57:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:57:02,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:02,583 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:57:02,583 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:57:02,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:57:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:57:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 19:57:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 19:57:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 19:57:02,589 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 19:57:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:02,589 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 19:57:02,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 19:57:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:02,590 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:02,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 19:57:02,791 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-15 19:57:02,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:02,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986758774] [2020-10-15 19:57:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986758774] [2020-10-15 19:57:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229621419] [2020-10-15 19:57:02,923 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:02,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:02,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:02,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:03,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:03,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923606582] [2020-10-15 19:57:03,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:03,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:03,231 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 19:57:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:03,574 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:57:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:03,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:03,575 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:57:03,575 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:57:03,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:57:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 19:57:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:57:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:57:03,579 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:57:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:03,580 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:57:03,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:57:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:03,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:03,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:03,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 19:57:03,784 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-15 19:57:03,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:03,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705324254] [2020-10-15 19:57:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705324254] [2020-10-15 19:57:03,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053721619] [2020-10-15 19:57:03,912 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:03,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:57:03,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:08,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:08,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:08,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827368598] [2020-10-15 19:57:08,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:08,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:08,825 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:13,048 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:13,319 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:57:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:13,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:13,321 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:13,322 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:13,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 19:57:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:57:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:13,326 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:13,326 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:13,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:13,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:13,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:13,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:13,537 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-15 19:57:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:13,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014784993] [2020-10-15 19:57:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:13,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014784993] [2020-10-15 19:57:13,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473019593] [2020-10-15 19:57:13,697 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:13,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:13,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:14,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:14,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126236502] [2020-10-15 19:57:14,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:14,213 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:14,849 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 19:57:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:14,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:14,851 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:14,851 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:14,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 19:57:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 19:57:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 19:57:14,857 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 19:57:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:14,857 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 19:57:14,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 19:57:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:14,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:14,858 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:15,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:15,069 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-15 19:57:15,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:15,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247073902] [2020-10-15 19:57:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:15,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247073902] [2020-10-15 19:57:15,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829989142] [2020-10-15 19:57:15,218 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:15,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:15,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:15,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:15,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:15,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:15,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316275518] [2020-10-15 19:57:15,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:15,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:15,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:15,454 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 19:57:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:15,838 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:57:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:57:15,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:15,841 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:15,841 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:15,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 19:57:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:15,845 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:15,845 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:15,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:15,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:15,846 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:16,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:16,049 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-15 19:57:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:16,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399352581] [2020-10-15 19:57:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399352581] [2020-10-15 19:57:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999061921] [2020-10-15 19:57:16,176 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:16,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:57:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:16,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:16,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:16,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396671515] [2020-10-15 19:57:16,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:16,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:16,408 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:16,805 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 19:57:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:16,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:16,806 INFO L225 Difference]: With dead ends: 224 [2020-10-15 19:57:16,806 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:57:16,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:57:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 19:57:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:16,809 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:16,809 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:16,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:16,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:16,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:17,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:17,013 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-15 19:57:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925731021] [2020-10-15 19:57:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:17,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925731021] [2020-10-15 19:57:17,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087661214] [2020-10-15 19:57:17,134 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:17,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:17,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:17,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:17,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660570602] [2020-10-15 19:57:17,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:17,360 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:17,707 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 19:57:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:17,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:17,708 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:17,709 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:17,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:57:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:17,712 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:17,712 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:17,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:17,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:17,713 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:17,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:17,913 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-15 19:57:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547788298] [2020-10-15 19:57:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:18,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547788298] [2020-10-15 19:57:18,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18679437] [2020-10-15 19:57:18,045 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:18,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:18,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:18,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:18,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:18,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90485625] [2020-10-15 19:57:18,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:18,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:18,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:18,266 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:18,565 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 19:57:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:18,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:18,566 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:57:18,567 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:57:18,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:57:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 19:57:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:57:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 19:57:18,569 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 19:57:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:18,569 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 19:57:18,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 19:57:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:18,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:18,570 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:18,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 19:57:18,771 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-15 19:57:18,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:18,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877906670] [2020-10-15 19:57:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:18,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877906670] [2020-10-15 19:57:18,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100936759] [2020-10-15 19:57:18,900 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:18,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:57:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:18,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:19,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:19,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698301867] [2020-10-15 19:57:19,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:19,126 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 19:57:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:19,438 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 19:57:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:19,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:19,439 INFO L225 Difference]: With dead ends: 207 [2020-10-15 19:57:19,439 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 19:57:19,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 19:57:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 19:57:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 19:57:19,443 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 19:57:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:19,443 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 19:57:19,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 19:57:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:19,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:19,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:19,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 19:57:19,644 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-15 19:57:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:19,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723495122] [2020-10-15 19:57:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:19,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723495122] [2020-10-15 19:57:19,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815182755] [2020-10-15 19:57:19,770 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:19,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:20,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:20,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991753078] [2020-10-15 19:57:20,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:20,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:20,006 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 19:57:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:20,341 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 19:57:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:20,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:20,343 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:57:20,343 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:57:20,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:57:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 19:57:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:57:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 19:57:20,347 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 19:57:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:20,348 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 19:57:20,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 19:57:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:20,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:20,349 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:20,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 19:57:20,557 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-15 19:57:20,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:20,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052967502] [2020-10-15 19:57:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052967502] [2020-10-15 19:57:20,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818568184] [2020-10-15 19:57:20,685 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:20,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049511810] [2020-10-15 19:57:21,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:21,842 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:22,270 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 19:57:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:22,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:22,272 INFO L225 Difference]: With dead ends: 223 [2020-10-15 19:57:22,272 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:57:22,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:57:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 19:57:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 19:57:22,275 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 19:57:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:22,275 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 19:57:22,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 19:57:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:22,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:22,275 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:22,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 19:57:22,476 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-15 19:57:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:22,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175140872] [2020-10-15 19:57:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:22,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175140872] [2020-10-15 19:57:22,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030861524] [2020-10-15 19:57:22,608 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:22,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:22,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:22,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:22,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911592050] [2020-10-15 19:57:22,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:22,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:22,806 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:23,131 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 19:57:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:23,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:23,133 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:57:23,133 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:57:23,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:57:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 19:57:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:57:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 19:57:23,136 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 19:57:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:23,137 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 19:57:23,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 19:57:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:23,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:23,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:23,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:23,338 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-15 19:57:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343777354] [2020-10-15 19:57:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343777354] [2020-10-15 19:57:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861750555] [2020-10-15 19:57:23,486 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:23,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:23,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73672527] [2020-10-15 19:57:23,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:23,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:23,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:23,737 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 19:57:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:24,069 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 19:57:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:24,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:24,071 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:57:24,071 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:57:24,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:57:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 19:57:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 19:57:24,074 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 19:57:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:24,074 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 19:57:24,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 19:57:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:24,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:24,075 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:24,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,276 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-15 19:57:24,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:24,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775728183] [2020-10-15 19:57:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775728183] [2020-10-15 19:57:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251576031] [2020-10-15 19:57:24,445 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:24,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:24,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:24,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936888981] [2020-10-15 19:57:24,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:24,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:24,683 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 19:57:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:24,928 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 19:57:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:24,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:24,929 INFO L225 Difference]: With dead ends: 203 [2020-10-15 19:57:24,929 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 19:57:24,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 19:57:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 19:57:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:57:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 19:57:24,932 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 19:57:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:24,932 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 19:57:24,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 19:57:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:24,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:24,933 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:25,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 19:57:25,134 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-15 19:57:25,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:25,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562490955] [2020-10-15 19:57:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562490955] [2020-10-15 19:57:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114065452] [2020-10-15 19:57:25,337 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:25,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:25,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232636472] [2020-10-15 19:57:25,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:25,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:25,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:25,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:25,570 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:25,642 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:57:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:25,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:25,643 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:25,644 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:25,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:57:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 19:57:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 19:57:25,647 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 19:57:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:25,647 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 19:57:25,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 19:57:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:25,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:25,648 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:25,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,849 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-15 19:57:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:25,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630078073] [2020-10-15 19:57:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630078073] [2020-10-15 19:57:26,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675735669] [2020-10-15 19:57:26,022 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:26,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654598267] [2020-10-15 19:57:26,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:26,259 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 19:57:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:26,536 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 19:57:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:26,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:26,537 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:57:26,537 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:57:26,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:57:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:57:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 19:57:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:57:26,541 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:57:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:26,541 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:57:26,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:57:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:26,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:26,542 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:26,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:26,744 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-15 19:57:26,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:26,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457265784] [2020-10-15 19:57:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457265784] [2020-10-15 19:57:26,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989390650] [2020-10-15 19:57:26,910 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:26,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:27,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:27,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945403197] [2020-10-15 19:57:27,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:27,196 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:57:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:27,536 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:57:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:27,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:27,537 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:57:27,537 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:57:27,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:57:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 19:57:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 19:57:27,540 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 19:57:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:27,540 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 19:57:27,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 19:57:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:27,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:27,540 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:27,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:27,741 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-15 19:57:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:27,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052883290] [2020-10-15 19:57:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:27,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052883290] [2020-10-15 19:57:27,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528745910] [2020-10-15 19:57:27,887 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:27,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:28,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:28,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:28,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50105824] [2020-10-15 19:57:28,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:28,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:28,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:28,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:28,189 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 19:57:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:28,716 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:57:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:28,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:28,717 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:57:28,717 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:57:28,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:57:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 19:57:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:57:28,721 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:57:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:28,721 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:57:28,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:57:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:28,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:28,722 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:28,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 19:57:28,926 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-15 19:57:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:28,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863124814] [2020-10-15 19:57:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:29,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863124814] [2020-10-15 19:57:29,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735270318] [2020-10-15 19:57:29,097 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:33,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:33,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:33,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560101053] [2020-10-15 19:57:33,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:33,159 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:57:37,403 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:37,744 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 19:57:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:37,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:37,745 INFO L225 Difference]: With dead ends: 237 [2020-10-15 19:57:37,745 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 19:57:37,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 19:57:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 19:57:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 19:57:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:37,749 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:37,749 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:37,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:37,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:37,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:37,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 19:57:37,950 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-10-15 19:57:37,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:37,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097023871] [2020-10-15 19:57:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097023871] [2020-10-15 19:57:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136770299] [2020-10-15 19:57:38,095 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:38,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:38,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:38,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670150556] [2020-10-15 19:57:38,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:38,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:38,518 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:39,038 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 19:57:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:39,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:39,039 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:57:39,039 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:57:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:57:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 19:57:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 19:57:39,042 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 19:57:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:39,042 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 19:57:39,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 19:57:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:39,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:39,042 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:39,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 19:57:39,243 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:39,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-10-15 19:57:39,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:39,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824644639] [2020-10-15 19:57:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:39,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824644639] [2020-10-15 19:57:39,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632927035] [2020-10-15 19:57:39,362 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:39,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:39,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:39,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:39,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456504265] [2020-10-15 19:57:39,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:39,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:39,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:39,601 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 19:57:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:40,065 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 19:57:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:40,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:40,066 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:57:40,066 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:57:40,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:57:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 19:57:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:40,070 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:40,070 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:40,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:40,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:40,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:40,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 19:57:40,271 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:40,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:40,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-10-15 19:57:40,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:40,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877148309] [2020-10-15 19:57:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877148309] [2020-10-15 19:57:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409602298] [2020-10-15 19:57:40,396 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:40,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:40,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:40,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:40,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918874606] [2020-10-15 19:57:40,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:40,674 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:41,383 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 19:57:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:57:41,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:41,385 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:57:41,385 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:57:41,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:57:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:57:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:41,389 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:41,389 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:41,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:41,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:41,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:41,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 19:57:41,590 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-10-15 19:57:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:41,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057527416] [2020-10-15 19:57:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:41,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057527416] [2020-10-15 19:57:41,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670614016] [2020-10-15 19:57:41,728 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:41,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:41,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:41,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:41,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:41,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467234042] [2020-10-15 19:57:41,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:41,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:41,955 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:42,353 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 19:57:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:42,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:42,355 INFO L225 Difference]: With dead ends: 234 [2020-10-15 19:57:42,355 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:57:42,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:57:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 19:57:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:42,358 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:42,358 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:42,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:42,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:42,359 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:42,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 19:57:42,567 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-10-15 19:57:42,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:42,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311955916] [2020-10-15 19:57:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311955916] [2020-10-15 19:57:42,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552577368] [2020-10-15 19:57:42,690 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:42,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:42,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:42,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76852101] [2020-10-15 19:57:42,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:42,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:42,916 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:43,290 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 19:57:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:43,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:43,291 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:43,291 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:43,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 19:57:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 19:57:43,297 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 19:57:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:43,297 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 19:57:43,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 19:57:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:43,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:43,298 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:43,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:43,501 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-10-15 19:57:43,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:43,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447378175] [2020-10-15 19:57:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447378175] [2020-10-15 19:57:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293728145] [2020-10-15 19:57:43,659 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:43,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:43,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:43,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114653720] [2020-10-15 19:57:43,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:43,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:43,885 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 19:57:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:44,007 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 19:57:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:57:44,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:44,008 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:57:44,008 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:57:44,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:57:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:57:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 19:57:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:57:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 19:57:44,012 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 19:57:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:44,012 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 19:57:44,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 19:57:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:44,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:44,013 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:44,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:44,214 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:44,214 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-10-15 19:57:44,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:44,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505440830] [2020-10-15 19:57:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505440830] [2020-10-15 19:57:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66675795] [2020-10-15 19:57:44,392 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:44,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:44,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:44,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413487077] [2020-10-15 19:57:44,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:44,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:44,667 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 19:57:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:44,999 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 19:57:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:45,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:45,000 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:57:45,000 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:57:45,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:57:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 19:57:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:57:45,004 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:57:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:45,004 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:57:45,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:57:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:45,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:45,005 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:45,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,205 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-10-15 19:57:45,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808226937] [2020-10-15 19:57:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:45,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808226937] [2020-10-15 19:57:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334193520] [2020-10-15 19:57:45,353 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:45,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:45,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:45,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757907887] [2020-10-15 19:57:45,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:45,654 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:46,062 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 19:57:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:46,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:46,063 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:46,064 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:46,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 19:57:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:57:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 19:57:46,067 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 19:57:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:46,067 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 19:57:46,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 19:57:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:46,068 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:46,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:46,269 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-10-15 19:57:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:46,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557079568] [2020-10-15 19:57:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:46,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557079568] [2020-10-15 19:57:46,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285690186] [2020-10-15 19:57:46,396 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:46,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:46,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:46,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279257924] [2020-10-15 19:57:46,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:46,669 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 19:57:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:47,156 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 19:57:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:47,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:47,157 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:57:47,157 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:57:47,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:57:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 19:57:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:57:47,161 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:57:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:47,162 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:57:47,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:57:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:47,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:47,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:47,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:47,370 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-10-15 19:57:47,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:47,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544241602] [2020-10-15 19:57:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544241602] [2020-10-15 19:57:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124919269] [2020-10-15 19:57:47,501 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:47,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:47,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:51,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:51,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:51,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699621293] [2020-10-15 19:57:51,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:51,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:51,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:51,368 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:55,658 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:56,047 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 19:57:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:56,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:56,049 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:57:56,050 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:57:56,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:57:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:57:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:57:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 19:57:56,053 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 19:57:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:56,054 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 19:57:56,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 19:57:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:56,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:56,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:56,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:56,255 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-10-15 19:57:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:56,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247484384] [2020-10-15 19:57:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:56,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247484384] [2020-10-15 19:57:56,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524120906] [2020-10-15 19:57:56,379 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:56,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:56,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:56,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:56,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:56,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606356450] [2020-10-15 19:57:56,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:56,682 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 19:57:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:57,215 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 19:57:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:57,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:57,216 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:57:57,217 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:57:57,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:57:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 19:57:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 19:57:57,220 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 19:57:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:57,220 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 19:57:57,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 19:57:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:57,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:57,221 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:57,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 19:57:57,422 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-10-15 19:57:57,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:57,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987008658] [2020-10-15 19:57:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:57,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987008658] [2020-10-15 19:57:57,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528985218] [2020-10-15 19:57:57,573 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:57,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:57,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:57,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771177135] [2020-10-15 19:57:57,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:57,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:57,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:57,822 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 19:57:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:58,009 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 19:57:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:58,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:58,011 INFO L225 Difference]: With dead ends: 204 [2020-10-15 19:57:58,011 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 19:57:58,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:57:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 19:57:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 19:57:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 19:57:58,015 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 19:57:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:58,015 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 19:57:58,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 19:57:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:58,015 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:58,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:58,216 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-10-15 19:57:58,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:58,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241012568] [2020-10-15 19:57:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:58,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241012568] [2020-10-15 19:57:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804206612] [2020-10-15 19:57:58,359 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:58,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:58,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:58,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:58,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:58,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766887915] [2020-10-15 19:57:58,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:58,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:58,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:58,584 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 19:57:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:58,933 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 19:57:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:58,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:58,935 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:57:58,935 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:57:58,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:57:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 19:57:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 19:57:58,939 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 19:57:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:58,939 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 19:57:58,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 19:57:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:58,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:58,939 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:59,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 19:57:59,140 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-10-15 19:57:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:59,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388928294] [2020-10-15 19:57:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:59,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388928294] [2020-10-15 19:57:59,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209408471] [2020-10-15 19:57:59,264 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:59,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:59,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:59,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:59,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:59,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129249085] [2020-10-15 19:57:59,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:59,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:59,662 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 19:58:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:00,146 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 19:58:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:58:00,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:00,148 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:58:00,148 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:58:00,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:58:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:58:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 19:58:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:58:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 19:58:00,152 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 19:58:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:00,152 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 19:58:00,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 19:58:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:00,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:00,153 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:00,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:00,356 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:00,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-10-15 19:58:00,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401533320] [2020-10-15 19:58:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401533320] [2020-10-15 19:58:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098434236] [2020-10-15 19:58:00,500 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:00,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:00,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:00,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:00,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:00,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977500034] [2020-10-15 19:58:00,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:00,742 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 19:58:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:00,937 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 19:58:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:58:00,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:00,938 INFO L225 Difference]: With dead ends: 200 [2020-10-15 19:58:00,938 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 19:58:00,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:58:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 19:58:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 19:58:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:58:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 19:58:00,942 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 19:58:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:00,942 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 19:58:00,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 19:58:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:00,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:00,942 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:01,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:01,143 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-10-15 19:58:01,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:01,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647203344] [2020-10-15 19:58:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:01,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647203344] [2020-10-15 19:58:01,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367777977] [2020-10-15 19:58:01,261 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:01,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:01,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:01,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:01,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87312674] [2020-10-15 19:58:01,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:01,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:01,513 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 19:58:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:01,920 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 19:58:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:58:01,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:01,921 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:58:01,921 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:58:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:58:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:58:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 19:58:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 19:58:01,924 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 19:58:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:01,924 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 19:58:01,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 19:58:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:01,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:01,925 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:02,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 19:58:02,134 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:02,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-10-15 19:58:02,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:02,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643197006] [2020-10-15 19:58:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:02,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643197006] [2020-10-15 19:58:02,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538514799] [2020-10-15 19:58:02,265 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:02,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:58:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 19:58:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:02,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:02,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 19:58:02,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467205832] [2020-10-15 19:58:02,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:58:02,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:58:02,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:58:02,335 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 19:58:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:02,534 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 19:58:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:58:02,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 19:58:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:02,535 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:58:02,535 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:58:02,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:58:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:58:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 19:58:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:02,539 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:02,539 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:02,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:58:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:02,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:02,539 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:02,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:02,740 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-10-15 19:58:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:02,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297992234] [2020-10-15 19:58:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:02,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297992234] [2020-10-15 19:58:02,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425252958] [2020-10-15 19:58:02,852 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:03,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:03,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:03,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:03,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697169752] [2020-10-15 19:58:03,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:03,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:03,125 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:03,669 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 19:58:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:03,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:03,670 INFO L225 Difference]: With dead ends: 226 [2020-10-15 19:58:03,671 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:58:03,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:58:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:58:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 19:58:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:58:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:58:03,675 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:58:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:03,675 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:58:03,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:58:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:03,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:03,676 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:03,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:03,876 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-10-15 19:58:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:03,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928004900] [2020-10-15 19:58:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928004900] [2020-10-15 19:58:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381813275] [2020-10-15 19:58:03,993 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:04,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:04,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:04,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:04,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414394830] [2020-10-15 19:58:04,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:04,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:04,248 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:58:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:04,686 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:58:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:58:04,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:04,688 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:58:04,688 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:58:04,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:58:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:58:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 19:58:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:04,692 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:04,692 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:04,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:04,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:04,693 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:04,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:04,894 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-10-15 19:58:04,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:04,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115218559] [2020-10-15 19:58:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115218559] [2020-10-15 19:58:05,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601545963] [2020-10-15 19:58:05,020 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:05,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:05,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:05,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460776232] [2020-10-15 19:58:05,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:05,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:05,301 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:06,027 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 19:58:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:58:06,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:06,029 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:58:06,029 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:58:06,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:58:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:58:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 19:58:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:06,032 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:06,033 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:06,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:06,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:06,033 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:06,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:06,234 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:06,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-10-15 19:58:06,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:06,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496503520] [2020-10-15 19:58:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496503520] [2020-10-15 19:58:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971415186] [2020-10-15 19:58:06,351 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:06,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:06,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:06,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630971734] [2020-10-15 19:58:06,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:06,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:06,606 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:07,181 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 19:58:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:07,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:07,183 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:58:07,183 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:58:07,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:58:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:58:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:58:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:58:07,186 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:58:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:07,186 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:58:07,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:58:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:07,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:07,187 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:07,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:07,387 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-10-15 19:58:07,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:07,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224340011] [2020-10-15 19:58:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224340011] [2020-10-15 19:58:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880880762] [2020-10-15 19:58:07,484 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:07,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:07,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:07,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:07,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461250220] [2020-10-15 19:58:07,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:07,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:07,800 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:58:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:08,535 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 19:58:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:08,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:08,537 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:58:08,537 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:58:08,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:58:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:58:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 19:58:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:58:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:58:08,544 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:58:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:08,544 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:58:08,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:58:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:08,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:08,545 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:08,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:08,754 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-10-15 19:58:08,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:08,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783472162] [2020-10-15 19:58:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783472162] [2020-10-15 19:58:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620772586] [2020-10-15 19:58:08,873 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:08,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:58:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:09,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:09,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:09,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24210546] [2020-10-15 19:58:09,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:09,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:09,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:09,211 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:58:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:09,883 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 19:58:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:58:09,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:09,884 INFO L225 Difference]: With dead ends: 252 [2020-10-15 19:58:09,884 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 19:58:09,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:58:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 19:58:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 19:58:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:09,888 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:09,888 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:09,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:09,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:09,889 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:10,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 19:58:10,090 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-10-15 19:58:10,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:10,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257891452] [2020-10-15 19:58:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:10,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257891452] [2020-10-15 19:58:10,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976719500] [2020-10-15 19:58:10,211 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:10,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:10,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:10,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:10,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635143443] [2020-10-15 19:58:10,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:10,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:10,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:10,509 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:11,430 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 19:58:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:58:11,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:11,433 INFO L225 Difference]: With dead ends: 258 [2020-10-15 19:58:11,433 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:58:11,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:58:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:58:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:58:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:11,436 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:11,436 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:11,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:11,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:11,437 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:11,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 19:58:11,640 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:11,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-10-15 19:58:11,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:11,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886754615] [2020-10-15 19:58:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886754615] [2020-10-15 19:58:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119859183] [2020-10-15 19:58:11,762 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:14,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:14,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:14,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:14,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442423469] [2020-10-15 19:58:14,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:14,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:14,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:14,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:58:14,097 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:18,417 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 19:58:22,712 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 19:58:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:23,421 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 19:58:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:58:23,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:23,424 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:58:23,424 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 19:58:23,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:58:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 19:58:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 19:58:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 19:58:23,428 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 19:58:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:23,428 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 19:58:23,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 19:58:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:23,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:23,429 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:23,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 19:58:23,633 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-10-15 19:58:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:23,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611256280] [2020-10-15 19:58:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611256280] [2020-10-15 19:58:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359992900] [2020-10-15 19:58:23,785 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:23,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:24,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:24,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:26,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:26,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:58:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741769574] [2020-10-15 19:58:26,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:58:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:26,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:58:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 19:58:26,208 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 18 states. [2020-10-15 19:58:28,875 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 19:58:36,600 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-15 19:58:50,563 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-15 19:59:00,705 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 19:59:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:27,273 INFO L93 Difference]: Finished difference Result 283 states and 667 transitions. [2020-10-15 19:59:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:27,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 19:59:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:27,276 INFO L225 Difference]: With dead ends: 283 [2020-10-15 19:59:27,276 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 19:59:27,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=391, Invalid=930, Unknown=11, NotChecked=0, Total=1332 [2020-10-15 19:59:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 19:59:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 160. [2020-10-15 19:59:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:59:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 19:59:27,279 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 19:59:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:27,279 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 19:59:27,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:59:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 19:59:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:27,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:27,280 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:27,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:27,481 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:27,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-10-15 19:59:27,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:27,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102211826] [2020-10-15 19:59:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102211826] [2020-10-15 19:59:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582135852] [2020-10-15 19:59:27,611 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:27,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:27,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:27,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661331780] [2020-10-15 19:59:27,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:27,977 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 19:59:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:28,742 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 19:59:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:28,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:28,744 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:59:28,744 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:59:28,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:59:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 19:59:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 19:59:28,746 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 19:59:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:28,746 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 19:59:28,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 19:59:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:28,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:28,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:28,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:28,948 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-10-15 19:59:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:28,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666177665] [2020-10-15 19:59:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:29,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666177665] [2020-10-15 19:59:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30766586] [2020-10-15 19:59:29,081 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:29,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:35,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273629317] [2020-10-15 19:59:35,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:59:35,651 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 19:59:40,040 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:59:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:46,550 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 19:59:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:46,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:46,551 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:59:46,552 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:59:46,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:59:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:59:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:59:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 19:59:46,555 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 19:59:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:46,555 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 19:59:46,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 19:59:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:46,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:46,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:46,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 19:59:46,757 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-10-15 19:59:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:46,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205042985] [2020-10-15 19:59:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:46,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205042985] [2020-10-15 19:59:46,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253706070] [2020-10-15 19:59:46,904 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:46,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:47,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:47,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698461452] [2020-10-15 19:59:47,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:47,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:47,338 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 19:59:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:48,033 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 19:59:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:48,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:48,035 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:59:48,035 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:59:48,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:59:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:59:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:59:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:59:48,039 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:59:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:48,039 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:59:48,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:59:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:48,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:48,040 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:48,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:48,241 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-10-15 19:59:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:48,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152591065] [2020-10-15 19:59:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152591065] [2020-10-15 19:59:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308805456] [2020-10-15 19:59:48,392 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132151218] [2020-10-15 19:59:48,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:48,750 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:59:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:49,747 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 19:59:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:59:49,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:49,749 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:59:49,749 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 19:59:49,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 19:59:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 19:59:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:59:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 19:59:49,753 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 19:59:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:49,753 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 19:59:49,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 19:59:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:49,754 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:49,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 19:59:49,955 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-10-15 19:59:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:49,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599219070] [2020-10-15 19:59:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599219070] [2020-10-15 19:59:50,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151755320] [2020-10-15 19:59:50,089 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:50,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:52,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:52,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:52,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521400283] [2020-10-15 19:59:52,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:52,428 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 19:59:56,906 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:00:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:11,824 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 20:00:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:00:11,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:11,826 INFO L225 Difference]: With dead ends: 264 [2020-10-15 20:00:11,827 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 20:00:11,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 20:00:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 20:00:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 20:00:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:00:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 20:00:11,830 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 20:00:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:11,830 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 20:00:11,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 20:00:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:11,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:11,831 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:12,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:12,032 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-10-15 20:00:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:12,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397640983] [2020-10-15 20:00:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397640983] [2020-10-15 20:00:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575693783] [2020-10-15 20:00:12,177 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:12,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:00:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:12,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:12,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:12,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514893219] [2020-10-15 20:00:12,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:12,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:12,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:12,585 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 20:00:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:13,591 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 20:00:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:00:13,592 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:13,593 INFO L225 Difference]: With dead ends: 255 [2020-10-15 20:00:13,593 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 20:00:13,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:00:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 20:00:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 20:00:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:00:13,596 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:00:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:13,596 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:00:13,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:00:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:13,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:13,597 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:13,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:13,798 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-10-15 20:00:13,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:13,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562588947] [2020-10-15 20:00:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:13,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562588947] [2020-10-15 20:00:13,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377718375] [2020-10-15 20:00:13,934 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:13,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:00:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:14,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:14,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:14,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011949678] [2020-10-15 20:00:14,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:14,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:14,334 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:00:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:15,572 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 20:00:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:00:15,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:15,575 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:00:15,575 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 20:00:15,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:00:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 20:00:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 20:00:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:00:15,579 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:00:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:15,579 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:00:15,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:00:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:15,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:15,580 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:15,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:00:15,780 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-10-15 20:00:15,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:15,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579324185] [2020-10-15 20:00:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579324185] [2020-10-15 20:00:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189115888] [2020-10-15 20:00:15,911 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:15,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:00:15,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:15,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:16,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:16,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:16,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:18,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:18,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:00:18,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724674154] [2020-10-15 20:00:18,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:00:18,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:00:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 20:00:18,288 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-10-15 20:00:23,265 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-15 20:00:25,409 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-15 20:00:31,809 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-15 20:00:42,068 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 20:00:58,726 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2020-10-15 20:01:04,930 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-15 20:02:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:04,745 INFO L93 Difference]: Finished difference Result 318 states and 744 transitions. [2020-10-15 20:02:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:02:04,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:02:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:04,748 INFO L225 Difference]: With dead ends: 318 [2020-10-15 20:02:04,748 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 20:02:04,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=513, Invalid=1276, Unknown=17, NotChecked=0, Total=1806 [2020-10-15 20:02:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 20:02:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 165. [2020-10-15 20:02:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:02:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 20:02:04,752 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 20:02:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:04,752 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 20:02:04,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:02:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 20:02:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:04,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:04,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:04,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:02:04,954 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-10-15 20:02:04,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:04,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710848889] [2020-10-15 20:02:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710848889] [2020-10-15 20:02:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288126152] [2020-10-15 20:02:05,123 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:05,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:02:05,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:08,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:08,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45677698] [2020-10-15 20:02:08,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:08,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 20:02:08,615 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 20:02:13,131 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 20:02:17,480 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:02:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:18,337 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 20:02:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:02:18,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:18,338 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:02:18,338 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:02:18,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 20:02:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:02:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 20:02:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:02:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:02:18,342 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:02:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:18,342 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:02:18,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:02:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:18,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:18,343 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:18,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:02:18,544 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-10-15 20:02:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800387112] [2020-10-15 20:02:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800387112] [2020-10-15 20:02:18,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565016887] [2020-10-15 20:02:18,703 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:29,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:29,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:29,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:29,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:29,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860812553] [2020-10-15 20:02:29,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:29,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=181, Unknown=4, NotChecked=0, Total=272 [2020-10-15 20:02:29,608 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:02:34,078 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 20:02:38,460 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 20:02:56,510 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 20:03:10,355 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 20:03:27,066 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 20:03:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:31,335 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-15 20:03:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:31,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:31,337 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:03:31,337 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:03:31,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=434, Invalid=957, Unknown=15, NotChecked=0, Total=1406 [2020-10-15 20:03:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:03:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-15 20:03:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 20:03:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 20:03:31,342 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 20:03:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:31,342 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 20:03:31,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 20:03:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:31,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:31,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:31,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 20:03:31,543 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-10-15 20:03:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:31,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165859466] [2020-10-15 20:03:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:31,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165859466] [2020-10-15 20:03:31,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847423883] [2020-10-15 20:03:31,731 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:31,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:34,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:34,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:34,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406917681] [2020-10-15 20:03:34,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 20:03:34,286 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 20:03:34,983 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:03:35,241 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-15 20:03:35,657 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-15 20:03:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:37,147 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 20:03:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:37,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:37,151 INFO L225 Difference]: With dead ends: 292 [2020-10-15 20:03:37,151 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 20:03:37,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 20:03:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 20:03:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 20:03:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:03:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 20:03:37,155 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 20:03:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:37,155 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 20:03:37,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 20:03:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:37,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:37,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:37,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:03:37,356 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-10-15 20:03:37,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:37,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464991975] [2020-10-15 20:03:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:37,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464991975] [2020-10-15 20:03:37,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950251744] [2020-10-15 20:03:37,551 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:37,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:38,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:38,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999316771] [2020-10-15 20:03:38,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:38,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:38,003 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 20:03:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:38,734 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 20:03:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:03:38,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:38,738 INFO L225 Difference]: With dead ends: 231 [2020-10-15 20:03:38,738 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 20:03:38,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 20:03:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 20:03:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:03:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 20:03:38,741 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 20:03:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 20:03:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 20:03:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:38,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:38,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 20:03:38,942 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-10-15 20:03:38,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:38,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505176817] [2020-10-15 20:03:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505176817] [2020-10-15 20:03:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891098242] [2020-10-15 20:03:39,097 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:39,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:39,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:39,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:39,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684691789] [2020-10-15 20:03:39,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:39,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:39,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:39,667 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 20:03:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:40,922 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 20:03:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:03:40,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:40,925 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:03:40,926 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:03:40,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:03:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:03:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 20:03:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 20:03:40,928 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 20:03:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:40,929 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 20:03:40,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 20:03:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:40,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:41,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:41,130 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-10-15 20:03:41,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:41,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127862051] [2020-10-15 20:03:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127862051] [2020-10-15 20:03:41,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785117832] [2020-10-15 20:03:41,291 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:41,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:03:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:41,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972320321] [2020-10-15 20:03:41,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:41,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:41,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:41,879 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 20:03:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:43,927 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 20:03:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:43,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:43,930 INFO L225 Difference]: With dead ends: 288 [2020-10-15 20:03:43,930 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 20:03:43,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:03:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 20:03:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 20:03:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:03:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 20:03:43,933 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 20:03:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:43,933 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 20:03:43,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 20:03:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:43,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:43,934 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:44,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 20:03:44,135 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-10-15 20:03:44,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:44,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658200612] [2020-10-15 20:03:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658200612] [2020-10-15 20:03:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682867653] [2020-10-15 20:03:44,291 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:44,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:44,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:44,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:44,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953849950] [2020-10-15 20:03:44,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:44,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:44,641 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 20:03:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:45,288 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 20:03:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:03:45,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:45,291 INFO L225 Difference]: With dead ends: 236 [2020-10-15 20:03:45,291 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 20:03:45,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 20:03:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 20:03:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:45,294 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:45,294 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:45,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:45,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:45,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:45,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:45,495 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-10-15 20:03:45,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:45,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662643108] [2020-10-15 20:03:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:45,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662643108] [2020-10-15 20:03:45,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815217687] [2020-10-15 20:03:45,694 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:45,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:46,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:46,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:46,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972345025] [2020-10-15 20:03:46,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:46,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:46,123 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:46,953 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 20:03:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:03:46,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:46,956 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:03:46,956 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:03:46,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:03:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 20:03:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:46,960 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:46,960 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:46,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:46,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:46,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:47,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:47,162 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-10-15 20:03:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:47,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625435324] [2020-10-15 20:03:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625435324] [2020-10-15 20:03:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387012553] [2020-10-15 20:03:47,347 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:47,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:47,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:47,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873338640] [2020-10-15 20:03:47,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:47,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:47,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:47,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:47,840 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:48,493 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 20:03:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:03:48,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:48,496 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:03:48,496 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:03:48,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:03:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 20:03:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:48,499 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:48,499 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:48,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:48,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:48,500 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:48,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:48,700 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-10-15 20:03:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:48,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524325121] [2020-10-15 20:03:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:48,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524325121] [2020-10-15 20:03:48,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434095721] [2020-10-15 20:03:48,857 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:48,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:48,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:49,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:49,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914007279] [2020-10-15 20:03:49,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:49,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:49,201 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:49,790 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 20:03:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:03:49,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:49,793 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:03:49,793 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:03:49,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:03:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:03:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:03:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:03:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:03:49,797 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:03:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:49,797 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:03:49,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:03:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:49,797 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:49,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:03:49,998 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-10-15 20:03:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:49,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824958979] [2020-10-15 20:03:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:50,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824958979] [2020-10-15 20:03:50,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091273179] [2020-10-15 20:03:50,174 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:50,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:50,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:50,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:50,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875762381] [2020-10-15 20:03:50,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:50,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:50,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:50,547 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:03:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:51,755 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 20:03:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:51,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:51,758 INFO L225 Difference]: With dead ends: 261 [2020-10-15 20:03:51,758 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 20:03:51,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:03:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 20:03:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 20:03:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:03:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 20:03:51,762 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 20:03:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:51,762 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 20:03:51,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 20:03:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:51,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:51,763 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:51,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:51,964 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-10-15 20:03:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:51,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581551137] [2020-10-15 20:03:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:52,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581551137] [2020-10-15 20:03:52,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601860049] [2020-10-15 20:03:52,151 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:52,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:52,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:52,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777749466] [2020-10-15 20:03:52,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:52,562 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 20:03:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:53,725 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 20:03:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:03:53,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:53,727 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:03:53,727 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:03:53,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:03:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:03:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 20:03:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:03:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 20:03:53,730 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 20:03:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:53,731 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 20:03:53,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 20:03:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:53,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:53,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:53,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:03:53,939 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-10-15 20:03:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685198586] [2020-10-15 20:03:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685198586] [2020-10-15 20:03:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050353670] [2020-10-15 20:03:54,161 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:54,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:54,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775053243] [2020-10-15 20:03:54,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:54,565 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 20:03:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:55,611 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 20:03:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:03:55,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:55,613 INFO L225 Difference]: With dead ends: 253 [2020-10-15 20:03:55,613 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 20:03:55,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:03:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 20:03:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 20:03:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:03:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 20:03:55,617 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 20:03:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:55,618 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 20:03:55,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 20:03:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:55,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:55,618 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:55,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:03:55,819 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-10-15 20:03:55,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:55,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140510264] [2020-10-15 20:03:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:56,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140510264] [2020-10-15 20:03:56,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272993675] [2020-10-15 20:03:56,062 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:56,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:56,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:56,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:56,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328387357] [2020-10-15 20:03:56,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:56,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:56,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:56,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:56,427 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 20:03:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:57,808 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 20:03:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:57,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:57,812 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:03:57,812 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:03:57,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:03:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:03:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 20:03:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:03:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:03:57,816 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:03:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:57,816 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:03:57,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:03:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:57,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:57,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:58,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:58,018 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-10-15 20:03:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:58,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783684511] [2020-10-15 20:03:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:58,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783684511] [2020-10-15 20:03:58,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716255760] [2020-10-15 20:03:58,230 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:58,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:58,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:58,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:58,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:58,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677558545] [2020-10-15 20:03:58,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:58,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:58,643 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:04:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:00,153 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 20:04:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:04:00,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:00,156 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:04:00,156 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:04:00,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:04:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:04:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 20:04:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 20:04:00,159 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 20:04:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:00,159 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 20:04:00,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 20:04:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:00,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:00,160 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:00,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:04:00,360 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-10-15 20:04:00,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:00,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641041382] [2020-10-15 20:04:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:00,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641041382] [2020-10-15 20:04:00,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896270018] [2020-10-15 20:04:00,521 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:00,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:00,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:00,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:00,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762121229] [2020-10-15 20:04:00,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:00,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:00,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:00,941 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 20:04:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:02,499 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 20:04:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:02,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:02,501 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:02,501 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:02,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:04:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 20:04:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:02,504 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:02,504 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:02,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:02,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:02,505 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:02,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 20:04:02,706 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:02,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-10-15 20:04:02,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:02,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607596148] [2020-10-15 20:04:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607596148] [2020-10-15 20:04:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815233069] [2020-10-15 20:04:02,928 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:02,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:03,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:03,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:03,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233019333] [2020-10-15 20:04:03,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:03,317 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:04,785 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 20:04:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:04,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:04,789 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:04:04,789 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:04:04,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:04:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:04:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 20:04:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:04,793 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:04,793 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:04,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:04,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:04,794 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:04,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:04,995 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-10-15 20:04:04,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:04,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332077846] [2020-10-15 20:04:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332077846] [2020-10-15 20:04:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279924123] [2020-10-15 20:04:05,245 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:05,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:05,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:05,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:05,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:05,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:05,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572765944] [2020-10-15 20:04:05,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:05,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:05,755 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:08,003 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 20:04:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:04:08,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:08,007 INFO L225 Difference]: With dead ends: 287 [2020-10-15 20:04:08,007 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 20:04:08,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 20:04:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 20:04:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 20:04:08,011 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 20:04:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:08,011 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 20:04:08,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 20:04:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:08,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:08,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:08,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:08,213 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-10-15 20:04:08,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:08,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059086496] [2020-10-15 20:04:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:08,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059086496] [2020-10-15 20:04:08,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226405168] [2020-10-15 20:04:08,420 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:08,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:04:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:08,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:09,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:09,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934848355] [2020-10-15 20:04:09,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:09,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:09,067 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 20:04:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:10,983 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 20:04:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:04:10,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:10,987 INFO L225 Difference]: With dead ends: 284 [2020-10-15 20:04:10,987 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 20:04:10,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:04:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 20:04:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 20:04:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:10,990 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:10,990 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:10,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:10,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:10,991 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:11,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:11,192 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-10-15 20:04:11,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:11,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114314806] [2020-10-15 20:04:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:11,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114314806] [2020-10-15 20:04:11,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88052755] [2020-10-15 20:04:11,380 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:11,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:11,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:11,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67321421] [2020-10-15 20:04:11,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:11,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:11,902 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:14,263 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 20:04:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:04:14,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:14,267 INFO L225 Difference]: With dead ends: 289 [2020-10-15 20:04:14,267 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 20:04:14,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:04:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 20:04:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 20:04:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 20:04:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 20:04:14,271 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 20:04:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:14,271 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 20:04:14,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 20:04:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:14,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:14,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:14,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:14,473 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-10-15 20:04:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:14,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139956841] [2020-10-15 20:04:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:14,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139956841] [2020-10-15 20:04:14,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084862991] [2020-10-15 20:04:14,680 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:14,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:14,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:14,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:15,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:15,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:15,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:15,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235405889] [2020-10-15 20:04:15,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:15,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:15,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:15,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:15,061 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 20:04:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:17,435 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 20:04:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:17,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:17,438 INFO L225 Difference]: With dead ends: 312 [2020-10-15 20:04:17,438 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 20:04:17,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:04:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 20:04:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 20:04:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:04:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 20:04:17,441 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 20:04:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:17,442 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 20:04:17,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 20:04:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:17,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:17,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:17,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:17,643 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-10-15 20:04:17,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:17,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537988700] [2020-10-15 20:04:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537988700] [2020-10-15 20:04:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153633655] [2020-10-15 20:04:17,838 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:17,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:17,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:18,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:18,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:18,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110794832] [2020-10-15 20:04:18,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:18,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:18,209 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 20:04:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:19,472 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 20:04:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:19,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:19,476 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:19,476 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:19,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:04:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 20:04:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:19,480 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:19,480 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:19,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:19,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:19,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:19,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 20:04:19,681 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-10-15 20:04:19,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:19,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996101732] [2020-10-15 20:04:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:19,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996101732] [2020-10-15 20:04:19,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871290624] [2020-10-15 20:04:19,892 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:19,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:20,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:20,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:20,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342105164] [2020-10-15 20:04:20,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:20,339 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:21,887 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 20:04:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:04:21,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:21,891 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:04:21,891 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:04:21,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:04:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:04:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 20:04:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:04:21,895 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:04:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:21,895 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:04:21,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:04:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:21,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:21,896 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:22,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:04:22,097 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-10-15 20:04:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:22,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886620637] [2020-10-15 20:04:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886620637] [2020-10-15 20:04:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056765540] [2020-10-15 20:04:22,336 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:22,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:22,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:22,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:22,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305628351] [2020-10-15 20:04:22,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:22,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:22,726 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:04:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:24,651 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 20:04:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:24,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:24,655 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:04:24,655 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 20:04:24,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:04:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 20:04:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 20:04:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 20:04:24,659 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 20:04:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:24,659 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 20:04:24,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 20:04:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:24,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:24,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:24,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 20:04:24,860 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-10-15 20:04:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:24,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49788457] [2020-10-15 20:04:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:25,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49788457] [2020-10-15 20:04:25,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254275441] [2020-10-15 20:04:25,099 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:25,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:04:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:25,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:25,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:25,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:25,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:25,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198880130] [2020-10-15 20:04:25,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:25,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:25,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:25,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:25,489 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 20:04:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:27,341 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 20:04:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:04:27,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:27,344 INFO L225 Difference]: With dead ends: 298 [2020-10-15 20:04:27,344 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 20:04:27,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 20:04:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 20:04:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 20:04:27,350 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 20:04:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:27,350 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 20:04:27,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 20:04:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:27,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:27,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:27,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:04:27,556 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:27,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-10-15 20:04:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:27,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889093332] [2020-10-15 20:04:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889093332] [2020-10-15 20:04:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208381634] [2020-10-15 20:04:27,761 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:28,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:28,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:28,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477510413] [2020-10-15 20:04:28,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:28,115 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 20:04:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:30,082 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 20:04:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:04:30,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:30,086 INFO L225 Difference]: With dead ends: 291 [2020-10-15 20:04:30,086 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 20:04:30,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 20:04:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 20:04:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:30,090 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:30,090 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:30,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:30,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:30,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:30,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 20:04:30,292 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-10-15 20:04:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:30,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661011114] [2020-10-15 20:04:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661011114] [2020-10-15 20:04:30,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458479010] [2020-10-15 20:04:30,536 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:30,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:30,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:31,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:31,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739149542] [2020-10-15 20:04:31,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:31,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:31,080 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:33,130 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 20:04:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:04:33,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:33,134 INFO L225 Difference]: With dead ends: 265 [2020-10-15 20:04:33,135 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 20:04:33,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:04:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 20:04:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 20:04:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:33,138 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:33,138 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:33,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:33,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:33,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:33,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:33,340 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:33,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-10-15 20:04:33,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:33,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190462991] [2020-10-15 20:04:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190462991] [2020-10-15 20:04:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232662838] [2020-10-15 20:04:33,588 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:33,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:33,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:34,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:34,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224845625] [2020-10-15 20:04:34,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:34,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:34,114 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:36,430 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 20:04:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:04:36,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:36,434 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:36,435 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:36,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:04:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 20:04:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:04:36,439 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:04:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:36,439 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:04:36,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:04:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:36,440 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:36,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 20:04:36,641 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-10-15 20:04:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:36,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747303623] [2020-10-15 20:04:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:36,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747303623] [2020-10-15 20:04:36,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898064113] [2020-10-15 20:04:36,905 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:36,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:37,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:37,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:37,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:37,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041944945] [2020-10-15 20:04:37,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:37,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:37,465 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:04:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:41,002 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 20:04:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:41,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:41,010 INFO L225 Difference]: With dead ends: 285 [2020-10-15 20:04:41,010 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:04:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:04:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:04:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 20:04:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:41,014 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:41,014 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:41,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:41,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:41,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:41,216 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-10-15 20:04:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:41,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832331263] [2020-10-15 20:04:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832331263] [2020-10-15 20:04:41,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294327374] [2020-10-15 20:04:41,486 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:41,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:46,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:50,294 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 20:04:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:50,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:50,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:04:50,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533085592] [2020-10-15 20:04:50,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:04:50,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:50,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:04:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 20:04:50,299 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 20:04:54,589 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 20:04:55,240 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-15 20:04:59,598 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:05:03,882 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-15 20:05:08,487 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-15 20:05:10,798 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:05:20,150 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-10-15 20:05:22,956 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 20:06:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:03,971 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 20:06:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:06:03,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:06:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:03,974 INFO L225 Difference]: With dead ends: 302 [2020-10-15 20:06:03,975 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 20:06:03,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-15 20:06:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 20:06:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 20:06:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:06:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 20:06:03,979 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 20:06:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:03,979 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 20:06:03,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:06:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 20:06:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:03,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:03,979 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:04,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:04,180 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-10-15 20:06:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:04,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965103578] [2020-10-15 20:06:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:04,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965103578] [2020-10-15 20:06:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59958872] [2020-10-15 20:06:04,392 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:04,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:04,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:04,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306219865] [2020-10-15 20:06:04,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:04,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:04,775 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 20:06:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:05,452 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 20:06:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:06:05,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:05,455 INFO L225 Difference]: With dead ends: 219 [2020-10-15 20:06:05,455 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 20:06:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 20:06:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 20:06:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:06:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:06:05,459 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:06:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:05,459 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:06:05,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:06:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:05,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:05,460 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:05,661 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-10-15 20:06:05,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:05,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178752259] [2020-10-15 20:06:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:05,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178752259] [2020-10-15 20:06:05,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654588595] [2020-10-15 20:06:05,860 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:06,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:06:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:06,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:06,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:06,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697488494] [2020-10-15 20:06:06,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:06,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:06,294 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:06:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:07,422 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 20:06:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:06:07,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:07,427 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:07,427 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 20:06:07,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 20:06:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 20:06:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 20:06:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 20:06:07,431 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 20:06:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:07,431 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 20:06:07,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 20:06:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:07,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:07,431 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:07,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:06:07,632 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-10-15 20:06:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:07,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695820764] [2020-10-15 20:06:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:07,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695820764] [2020-10-15 20:06:07,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476916613] [2020-10-15 20:06:07,917 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:07,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:08,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:08,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649786912] [2020-10-15 20:06:08,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:08,404 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 20:06:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:09,198 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:06:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:09,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:09,202 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:09,202 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:06:09,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:06:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:06:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:06:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:06:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:06:09,205 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:06:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:09,205 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:06:09,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:06:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:09,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:09,206 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:09,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:06:09,407 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-10-15 20:06:09,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:09,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203283752] [2020-10-15 20:06:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203283752] [2020-10-15 20:06:09,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829633981] [2020-10-15 20:06:09,658 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:09,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:10,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:10,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:10,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873739831] [2020-10-15 20:06:10,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:10,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:10,058 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:06:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:10,813 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 20:06:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:10,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:10,815 INFO L225 Difference]: With dead ends: 237 [2020-10-15 20:06:10,815 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 20:06:10,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 20:06:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 20:06:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:06:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 20:06:10,818 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 20:06:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:10,819 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 20:06:10,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 20:06:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:10,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:10,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:11,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:06:11,022 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-10-15 20:06:11,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:11,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606539669] [2020-10-15 20:06:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606539669] [2020-10-15 20:06:11,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5095637] [2020-10-15 20:06:11,286 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:11,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:11,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:14,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:14,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:14,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960245329] [2020-10-15 20:06:14,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:14,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:14,214 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 20:06:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:15,372 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:06:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:06:15,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:15,374 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:06:15,374 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:06:15,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:06:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 20:06:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 20:06:15,378 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 20:06:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 20:06:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 20:06:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:15,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:15,378 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:15,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:06:15,579 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-10-15 20:06:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:15,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481147822] [2020-10-15 20:06:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:15,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481147822] [2020-10-15 20:06:15,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970565888] [2020-10-15 20:06:15,822 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:15,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:15,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:16,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:16,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:16,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098559704] [2020-10-15 20:06:16,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:16,254 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 20:06:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:17,029 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 20:06:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:17,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:17,031 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:06:17,032 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:06:17,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:06:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 20:06:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:06:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 20:06:17,035 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 20:06:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:17,035 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 20:06:17,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 20:06:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:17,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:17,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:17,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:06:17,242 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-10-15 20:06:17,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:17,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87065512] [2020-10-15 20:06:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:17,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87065512] [2020-10-15 20:06:17,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494325612] [2020-10-15 20:06:17,483 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:17,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122288391] [2020-10-15 20:06:18,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:18,001 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 20:06:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:18,773 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 20:06:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:18,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:18,777 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:06:18,777 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:06:18,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:06:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:06:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 20:06:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:06:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 20:06:18,780 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 20:06:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:18,780 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 20:06:18,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 20:06:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:18,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:18,781 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:18,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 20:06:18,982 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-10-15 20:06:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:18,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640810944] [2020-10-15 20:06:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640810944] [2020-10-15 20:06:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455934748] [2020-10-15 20:06:19,261 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:19,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:19,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429304844] [2020-10-15 20:06:19,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:19,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:19,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:19,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:19,664 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 20:06:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:20,261 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 20:06:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:06:20,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:20,266 INFO L225 Difference]: With dead ends: 220 [2020-10-15 20:06:20,266 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:06:20,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:06:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:06:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 20:06:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 20:06:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 20:06:20,269 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 20:06:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:20,270 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 20:06:20,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 20:06:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:20,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:20,270 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:20,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:06:20,471 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-10-15 20:06:20,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:20,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410368051] [2020-10-15 20:06:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:20,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410368051] [2020-10-15 20:06:20,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460095768] [2020-10-15 20:06:20,657 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:20,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:20,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:20,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:21,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:21,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:21,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516052068] [2020-10-15 20:06:21,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:21,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:21,129 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 20:06:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:21,958 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:06:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:21,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:21,962 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:21,962 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:06:21,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:06:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 20:06:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:06:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 20:06:21,972 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 20:06:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:21,972 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 20:06:21,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 20:06:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:21,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:22,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 20:06:22,177 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:22,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-10-15 20:06:22,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:22,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421829050] [2020-10-15 20:06:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:22,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421829050] [2020-10-15 20:06:22,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709115700] [2020-10-15 20:06:22,418 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:22,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:22,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:22,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:22,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:22,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:22,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658149980] [2020-10-15 20:06:22,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:22,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:22,960 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 20:06:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:23,870 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 20:06:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:23,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:23,872 INFO L225 Difference]: With dead ends: 233 [2020-10-15 20:06:23,872 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 20:06:23,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 20:06:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 20:06:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:06:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 20:06:23,876 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 20:06:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:23,876 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 20:06:23,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 20:06:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:23,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:23,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:24,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:24,077 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-10-15 20:06:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:24,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941828506] [2020-10-15 20:06:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941828506] [2020-10-15 20:06:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473942018] [2020-10-15 20:06:24,347 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:24,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:24,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:25,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:25,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090361295] [2020-10-15 20:06:25,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:25,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:25,135 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 20:06:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:26,606 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 20:06:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:06:26,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:26,611 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:06:26,611 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:06:26,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:06:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 20:06:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:06:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 20:06:26,615 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 20:06:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:26,615 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 20:06:26,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 20:06:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:26,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:26,615 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:26,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:26,816 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-10-15 20:06:26,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:26,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489169546] [2020-10-15 20:06:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:27,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489169546] [2020-10-15 20:06:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202049070] [2020-10-15 20:06:27,068 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:27,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:27,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:27,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:27,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193476585] [2020-10-15 20:06:27,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:27,577 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 20:06:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:28,656 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:06:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:28,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:28,658 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:06:28,658 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:06:28,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:06:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 20:06:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:06:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 20:06:28,662 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 20:06:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:28,662 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 20:06:28,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 20:06:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:28,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:28,662 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:28,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:28,863 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-10-15 20:06:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:28,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635415020] [2020-10-15 20:06:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635415020] [2020-10-15 20:06:29,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731943782] [2020-10-15 20:06:29,091 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:29,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:06:29,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:29,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497217635] [2020-10-15 20:06:29,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:29,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:29,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:29,613 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 20:06:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:30,809 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 20:06:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:30,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:30,814 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:06:30,814 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:06:30,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:06:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 20:06:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:06:30,818 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:06:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:06:30,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:06:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:30,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:30,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:31,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:06:31,019 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-10-15 20:06:31,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:31,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250834365] [2020-10-15 20:06:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:31,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250834365] [2020-10-15 20:06:31,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310538345] [2020-10-15 20:06:31,179 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:31,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:31,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:31,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:31,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442104959] [2020-10-15 20:06:31,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:31,685 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:06:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:32,843 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 20:06:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:06:32,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:32,847 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:06:32,847 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:06:32,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:06:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 20:06:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:06:32,851 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:06:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:32,851 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:06:32,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:06:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:32,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:32,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:33,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:33,053 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-10-15 20:06:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:33,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70993135] [2020-10-15 20:06:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70993135] [2020-10-15 20:06:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926406282] [2020-10-15 20:06:33,306 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:33,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:33,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:33,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:33,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433031507] [2020-10-15 20:06:33,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:33,822 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:06:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:35,546 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 20:06:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:06:35,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:35,551 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:06:35,551 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:06:35,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:06:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:06:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 20:06:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:06:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:06:35,555 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:06:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:35,555 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:06:35,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:06:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:35,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:35,555 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:35,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:06:35,756 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-10-15 20:06:35,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:35,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509746607] [2020-10-15 20:06:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509746607] [2020-10-15 20:06:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019117694] [2020-10-15 20:06:36,056 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:36,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:06:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:36,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:36,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312380272] [2020-10-15 20:06:36,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:36,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:36,681 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:06:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:38,254 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 20:06:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:06:38,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:38,259 INFO L225 Difference]: With dead ends: 254 [2020-10-15 20:06:38,259 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 20:06:38,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:06:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 20:06:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 20:06:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:06:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 20:06:38,263 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 20:06:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:38,263 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 20:06:38,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 20:06:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:38,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:38,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:38,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:06:38,465 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:38,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-10-15 20:06:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:38,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119604675] [2020-10-15 20:06:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119604675] [2020-10-15 20:06:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559405403] [2020-10-15 20:06:38,782 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:38,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:39,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:39,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:39,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875617323] [2020-10-15 20:06:39,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:39,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:39,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:39,374 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 20:06:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:40,664 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 20:06:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:40,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:40,669 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:06:40,669 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 20:06:40,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:06:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 20:06:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 20:06:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:06:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:06:40,680 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:06:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:40,680 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:06:40,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:06:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:40,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:40,681 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:40,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:40,882 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-10-15 20:06:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:40,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220814046] [2020-10-15 20:06:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220814046] [2020-10-15 20:06:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102013463] [2020-10-15 20:06:41,147 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:41,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:06:41,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:41,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:41,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:41,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252492465] [2020-10-15 20:06:41,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:41,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:41,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:41,609 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:06:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:43,073 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 20:06:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:43,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:43,078 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:06:43,078 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:06:43,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:06:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:06:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 20:06:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:06:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:06:43,083 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:06:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:43,083 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:06:43,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:06:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:43,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:43,084 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:43,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:43,295 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-10-15 20:06:43,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:43,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349295266] [2020-10-15 20:06:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:43,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349295266] [2020-10-15 20:06:43,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174938301] [2020-10-15 20:06:43,560 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:43,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:43,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:06:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:43,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:43,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:43,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468015014] [2020-10-15 20:06:43,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:43,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:43,934 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:06:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:44,856 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 20:06:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:06:44,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:44,861 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:06:44,861 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:06:44,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:06:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 20:06:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:06:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:06:44,864 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:06:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:44,864 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:06:44,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:06:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:44,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:44,865 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:45,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 20:06:45,066 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-10-15 20:06:45,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:45,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598229454] [2020-10-15 20:06:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:45,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598229454] [2020-10-15 20:06:45,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223440367] [2020-10-15 20:06:45,348 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:45,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:06:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:45,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:45,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:45,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908079105] [2020-10-15 20:06:45,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:45,780 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:06:46,908 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-15 20:06:47,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:47,905 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 20:06:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:06:47,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:47,907 INFO L225 Difference]: With dead ends: 286 [2020-10-15 20:06:47,907 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 20:06:47,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:06:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 20:06:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 20:06:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:06:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:06:47,911 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:06:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:47,911 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:06:47,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:06:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:47,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:47,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:48,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:48,112 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:48,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-10-15 20:06:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:48,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420201531] [2020-10-15 20:06:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:48,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420201531] [2020-10-15 20:06:48,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018306603] [2020-10-15 20:06:48,389 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:48,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:48,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:48,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:48,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:48,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330560447] [2020-10-15 20:06:48,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:48,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:48,924 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:06:50,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:50,680 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 20:06:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:06:50,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:50,682 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:06:50,682 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:06:50,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:06:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:06:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 20:06:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:06:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:06:50,686 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:06:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:50,686 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:06:50,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:06:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:50,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:50,687 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:50,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 20:06:50,888 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-10-15 20:06:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:50,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055597214] [2020-10-15 20:06:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:51,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055597214] [2020-10-15 20:06:51,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353470928] [2020-10-15 20:06:51,190 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:51,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:51,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:06:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:51,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:51,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:51,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939010217] [2020-10-15 20:06:51,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:51,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:51,743 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:06:53,078 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-15 20:06:53,348 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-10-15 20:06:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:54,601 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 20:06:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:06:54,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:54,606 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:06:54,606 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:06:54,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:06:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:06:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 20:06:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:06:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:06:54,610 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:06:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:54,610 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:06:54,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:06:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:54,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:54,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:54,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:54,813 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-10-15 20:06:54,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:54,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868724313] [2020-10-15 20:06:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868724313] [2020-10-15 20:06:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366639604] [2020-10-15 20:06:55,126 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:55,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:55,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:06:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:55,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:55,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:55,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150672419] [2020-10-15 20:06:55,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:55,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:55,736 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:06:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:58,160 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 20:06:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:06:58,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:58,166 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:06:58,167 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 20:06:58,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:06:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 20:06:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 20:06:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:06:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:06:58,172 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:06:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:58,172 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:06:58,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:06:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:58,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:58,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:58,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:58,384 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-10-15 20:06:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:58,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196607855] [2020-10-15 20:06:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196607855] [2020-10-15 20:06:58,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348863596] [2020-10-15 20:06:58,654 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:58,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:58,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:58,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:59,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:59,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:59,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021703350] [2020-10-15 20:06:59,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:59,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:59,403 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:07:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:01,562 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 20:07:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:07:01,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:01,568 INFO L225 Difference]: With dead ends: 274 [2020-10-15 20:07:01,568 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 20:07:01,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:07:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 20:07:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 20:07:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:07:01,572 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:07:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:01,572 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:07:01,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:07:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:01,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:01,573 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:01,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:01,783 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:01,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-10-15 20:07:01,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:01,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285565575] [2020-10-15 20:07:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:02,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285565575] [2020-10-15 20:07:02,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812773197] [2020-10-15 20:07:02,049 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:02,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:07:02,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:03,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:03,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793493743] [2020-10-15 20:07:03,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:03,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:03,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:03,681 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:07:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:06,167 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 20:07:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:07:06,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:06,173 INFO L225 Difference]: With dead ends: 282 [2020-10-15 20:07:06,173 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:07:06,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:07:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:07:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 20:07:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 20:07:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 20:07:06,179 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 20:07:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:06,179 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 20:07:06,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 20:07:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:06,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:06,181 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:06,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:07:06,385 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-10-15 20:07:06,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:06,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655802909] [2020-10-15 20:07:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:06,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655802909] [2020-10-15 20:07:06,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718381777] [2020-10-15 20:07:06,674 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:07,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:07:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:07,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:07,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:07,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188265315] [2020-10-15 20:07:07,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:07,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:07,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:07,168 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 20:07:08,462 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-10-15 20:07:09,775 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-10-15 20:07:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:10,434 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 20:07:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:07:10,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:10,438 INFO L225 Difference]: With dead ends: 321 [2020-10-15 20:07:10,438 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 20:07:10,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:07:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 20:07:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 20:07:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 20:07:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 20:07:10,446 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 20:07:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:10,446 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 20:07:10,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 20:07:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:10,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:10,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:10,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 20:07:10,648 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-10-15 20:07:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:10,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75817696] [2020-10-15 20:07:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:10,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75817696] [2020-10-15 20:07:10,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036446715] [2020-10-15 20:07:10,934 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:10,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:07:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:15,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:07:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:15,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:15,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:15,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416099782] [2020-10-15 20:07:15,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 20:07:15,880 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 20:07:16,639 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-15 20:07:21,101 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 20:07:25,349 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:07:25,536 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 Received shutdown request... [2020-10-15 20:07:29,785 WARN L210 SmtUtils]: Removed 4 from assertion stack [2020-10-15 20:07:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:07:29,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 20:07:29,986 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:07:29,990 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:07:29,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:29 BasicIcfg [2020-10-15 20:07:29,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:07:29,991 INFO L168 Benchmark]: Toolchain (without parser) took 872221.74 ms. Allocated memory was 251.7 MB in the beginning and 224.4 MB in the end (delta: -27.3 MB). Free memory was 205.5 MB in the beginning and 144.2 MB in the end (delta: 61.4 MB). Peak memory consumption was 34.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,991 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:29,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.21 ms. Allocated memory was 251.7 MB in the beginning and 314.6 MB in the end (delta: 62.9 MB). Free memory was 205.5 MB in the beginning and 267.9 MB in the end (delta: -62.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 314.6 MB. Free memory was 267.9 MB in the beginning and 265.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,992 INFO L168 Benchmark]: Boogie Preprocessor took 28.98 ms. Allocated memory is still 314.6 MB. Free memory was 265.4 MB in the beginning and 262.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,992 INFO L168 Benchmark]: RCFGBuilder took 370.60 ms. Allocated memory is still 314.6 MB. Free memory was 262.9 MB in the beginning and 243.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,993 INFO L168 Benchmark]: TraceAbstraction took 871149.56 ms. Allocated memory was 314.6 MB in the beginning and 224.4 MB in the end (delta: -90.2 MB). Free memory was 243.6 MB in the beginning and 144.2 MB in the end (delta: 99.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:29,995 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 613.21 ms. Allocated memory was 251.7 MB in the beginning and 314.6 MB in the end (delta: 62.9 MB). Free memory was 205.5 MB in the beginning and 267.9 MB in the end (delta: -62.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 53.36 ms. Allocated memory is still 314.6 MB. Free memory was 267.9 MB in the beginning and 265.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.98 ms. Allocated memory is still 314.6 MB. Free memory was 265.4 MB in the beginning and 262.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 370.60 ms. Allocated memory is still 314.6 MB. Free memory was 262.9 MB in the beginning and 243.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 871149.56 ms. Allocated memory was 314.6 MB in the beginning and 224.4 MB in the end (delta: -90.2 MB). Free memory was 243.6 MB in the beginning and 144.2 MB in the end (delta: 99.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 721 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (176states) and FLOYD_HOARE automaton (currently 14 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 58 for 4114ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 871.0s, OverallIterations: 258, TraceHistogramMax: 6, AutomataDifference: 653.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 3352 SDtfs, 31052 SDslu, 25496 SDs, 0 SdLazy, 18107 SolverSat, 7684 SolverUnsat, 117 SolverUnknown, 0 SolverNotchecked, 251.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7330 GetRequests, 1247 SyntacticMatches, 227 SemanticMatches, 5855 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38086 ImplicationChecksByTransitivity, 522.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 257 MinimizatonAttempts, 15151 StatesRemovedByMinimization, 257 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 150.5s InterpolantComputationTime, 6574 NumberOfCodeBlocks, 6574 NumberOfCodeBlocksAsserted, 805 NumberOfCheckSat, 6066 ConstructedInterpolants, 32 QuantifiedInterpolants, 673315 SizeOfPredicates, 250 NumberOfNonLiveVariables, 22230 ConjunctsInSsa, 2536 ConjunctsInUnsatCore, 508 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2794 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown